How to extract positive, negative and fraction numbers from string?

How do I extract numbers from a string where the number can be positive, negative or even fractions?

I tried the following but it is not getting the fractions. Thanks.

B = str2double(regexp(str,'[+-]?\d+','match'));

[Walter Roberson]

When there is a fraction, is the input permitted to omit leading 0? 0.5 vs .5 ? The expression is easier if the 0 would be required.

Is it necessary to support scientific notation?

[Image Analyst]

Give some examples of what the strings might be.

[Stephen23]

See also comment from @Nadatimuj here: https://www.mathworks.com/matlabcentral/answers/406543-how-to-extract-only-floating-numbers-from-a-string#comment_2028794

The answer there also answers this question.

[Nadatimuj]

I am sorry I couldn't respond soooner. This is something that I want to read. This is standard QUBO format used by D-wave and quantum machines, where the paranthesis has the indices and the other values are the co-efficients which can be positive, negative, floats etc. For example: it can be -250.556

{(0, 0): -8, (0, 1): 2, (0, 2): 2, (0, 3): 2, (0, 4): 2, (0, 5): 2, (0, 6): 2, (0, 7): 2, (0, 8): 4, (0, 9): 8, (1, 1): -12, (1, 2): 2, (1, 3): 2, (1, 4): 2, (1, 5): 2, (1, 6): 2, (1, 7): 2, (1, 8): 4, (1, 9): 8, (2, 2): -10, (2, 3): 2, (2, 4): 2, (2, 5): 2, (2, 6): 2, (2, 7): 2, (2, 8): 4, (2, 9): 8, (3, 3): -8, (3, 4): 2, (3, 5): 2, (3, 6): 2, (3, 7): 2, (3, 8): 4, (3, 9): 8, (4, 4): -8, (4, 5): 2, (4, 6): 2, (4, 7): 2, (4, 8): 4, (4, 9): 8, (5, 5): -10, (5, 6): 2, (5, 7): 2, (5, 8): 4, (5, 9): 8, (6, 6): -8, (6, 7): 2, (6, 8): 4, (6, 9): 8, (7, 7): -9, (8, 8): -16, (9, 9): -24, (7, 8): 4, (7, 9): 8, (8, 9): 16, (10, 10): 58.0, (0, 10): -2, (1, 11): 2, (11, 11): 56.0, (2, 12): 2, (12, 12): 56.0, (13, 13): 58.0, (3, 13): -2, (14, 14): 58.0, (4, 14): -2, (15, 15): 58.0, (5, 15): -2, (16, 16): 58.0, (6, 16): -2, (17, 17): -55.0, (17, 18): 4, (17, 19): 8, (17, 20): 16, (17, 21): 32, (17, 22): 64, (10, 17): -2, (11, 17): -2, (12, 17): -2, (13, 17): -2, (14, 17): -2, (15, 17): -2, (16, 17): -2, (18, 18): -108.0, (18, 19): 16, (18, 20): 32, (18, 21): 64, (18, 22): 128, (10, 18): -4, (11, 18): -4, (12, 18): -4, (13, 18): -4, (14, 18): -4, (15, 18): -4, (16, 18): -4, (19, 19): -208.0, (19, 20): 64, (19, 21): 128, (19, 22): 256, (10, 19): -8, (11, 19): -8, (12, 19): -8, (13, 19): -8, (14, 19): -8, (15, 19): -8, (16, 19): -8, (20, 20): -384.0, (20, 21): 256, (20, 22): 512, (10, 20): -16, (11, 20): -16, (12, 20): -16, (13, 20): -16, (14, 20): -16, (15, 20): -16, (16, 20): -16, (21, 21): -640.0, (21, 22): 1024, (10, 21): -32, (11, 21): -32, (12, 21): -32, (13, 21): -32, (14, 21): -32, (15, 21): -32, (16, 21): -32, (22, 22): -771.0, (10, 22): -64, (11, 22): -64, (12, 22): -64, (13, 22): -64, (14, 22): -64, (15, 22): -64, (16, 22): -64, (10, 11): 2, (10, 12): 2, (10, 13): 2, (10, 14): 2, (10, 15): 2, (10, 16): 2, (11, 12): 2, (11, 13): 2, (11, 14): 2, (11, 15): 2, (11, 16): 2, (12, 13): 2, (12, 14): 2, (12, 15): 2, (12, 16): 2, (13, 14): 2, (13, 15): 2, (13, 16): 2, (14, 15): 2, (14, 16): 2, (15, 16): 2, (23, 23): 60.0, (0, 23): -2, (1, 24): 2, (24, 24): 58.0, (2, 25): 2, (25, 25): 58.0, (26, 26): 60.0, (3, 26): -2, (4, 27): 2, (27, 27): 58.0, (5, 28): 2, (28, 28): 58.0, (29, 29): 60.0, (6, 29): -2, (30, 30): -57.0, (30, 31): 4, (30, 32): 8, (30, 33): 16, (30, 34): 32, (30, 35): 64, (23, 30): -2, (24, 30): -2, (25, 30): -2, (26, 30): -2, (27, 30): -2, (28, 30): -2, (29, 30): -2, (31, 31): -112.0, (31, 32): 16, (31, 33): 32, (31, 34): 64, (31, 35): 128, (23, 31): -4, (24, 31): -4, (25, 31): -4, (26, 31): -4, (27, 31): -4, (28, 31): -4, (29, 31): -4, (32, 32): -216.0, (32, 33): 64, (32, 34): 128, (32, 35): 256, (23, 32): -8, (24, 32): -8, (25, 32): -8, (26, 32): -8, (27, 32): -8, (28, 32): -8, (29, 32): -8, (33, 33): -400.0, (33, 34): 256, (33, 35): 512, (23, 33): -16, (24, 33): -16, (25, 33): -16, (26, 33): -16, (27, 33): -16, (28, 33): -16, (29, 33): -16, (34, 34): -672.0, (34, 35): 1024, (23, 34): -32, (24, 34): -32, (25, 34): -32, (26, 34): -32, (27, 34): -32, (28, 34): -32, (29, 34): -32, (35, 35): -829.0, (23, 35): -64, (24, 35): -64, (25, 35): -64, (26, 35): -64, (27, 35): -64, (28, 35): -64, (29, 35): -64, (23, 24): 2, (23, 25): 2, (23, 26): 2, (23, 27): 2, (23, 28): 2, (23, 29): 2, (24, 25): 2, (24, 26): 2, (24, 27): 2, (24, 28): 2, (24, 29): 2, (25, 26): 2, (25, 27): 2, (25, 28): 2, (25, 29): 2, (26, 27): 2, (26, 28): 2, (26, 29): 2, (27, 28): 2, (27, 29): 2, (28, 29): 2, (0, 36): 2, (36, 36): 54.0, (1, 37): 2, (37, 37): 54.0, (38, 38): 56.0, (2, 38): -2, (3, 39): 2, (39, 39): 54.0, (40, 40): 56.0, (4, 40): -2, (5, 41): 2, (41, 41): 54.0, (6, 42): 2, (42, 42): 54.0, (43, 43): -53.0, (43, 44): 4, (43, 45): 8, (43, 46): 16, (43, 47): 32, (43, 48): 64, (36, 43): -2, (37, 43): -2, (38, 43): -2, (39, 43): -2, (40, 43): -2, (41, 43): -2, (42, 43): -2, (44, 44): -104.0, (44, 45): 16, (44, 46): 32, (44, 47): 64, (44, 48): 128, (36, 44): -4, (37, 44): -4, (38, 44): -4, (39, 44): -4, (40, 44): -4, (41, 44): -4, (42, 44): -4, (45, 45): -200.0, (45, 46): 64, (45, 47): 128, (45, 48): 256, (36, 45): -8, (37, 45): -8, (38, 45): -8, (39, 45): -8, (40, 45): -8, (41, 45): -8, (42, 45): -8, (46, 46): -368.0, (46, 47): 256, (46, 48): 512, (36, 46): -16, (37, 46): -16, (38, 46): -16, (39, 46): -16, (40, 46): -16, (41, 46): -16, (42, 46): -16, (47, 47): -608.0, (47, 48): 1024, (36, 47): -32, (37, 47): -32, (38, 47): -32, (39, 47): -32, (40, 47): -32, (41, 47): -32, (42, 47): -32, (48, 48): -703.0, (36, 48): -64, (37, 48): -64, (38, 48): -64, (39, 48): -64, (40, 48): -64, (41, 48): -64, (42, 48): -64, (36, 37): 2, (36, 38): 2, (36, 39): 2, (36, 40): 2, (36, 41): 2, (36, 42): 2, (37, 38): 2, (37, 39): 2, (37, 40): 2, (37, 41): 2, (37, 42): 2, (38, 39): 2, (38, 40): 2, (38, 41): 2, (38, 42): 2, (39, 40): 2, (39, 41): 2, (39, 42): 2, (40, 41): 2, (40, 42): 2, (41, 42): 2, (22, 49): 2, (50, 50): 2, (35, 50): -2, (48, 51): 2, (52, 52): 1, (52, 53): 4, (49, 52): -2, (50, 52): -2, (51, 52): -2, (53, 53): 5, (49, 53): -4, (50, 53): -4, (51, 53): -4, (49, 50): 2, (49, 51): 2, (50, 51): 2, (22, 54): 2, (55, 55): 2, (35, 55): -2, (56, 56): 2, (48, 56): -2, (57, 57): 1, (57, 58): 4, (54, 57): -2, (55, 57): -2, (56, 57): -2, (58, 58): 3, (54, 58): -4, (55, 58): -4, (56, 58): -4, (54, 55): 2, (54, 56): 2, (55, 56): 2, (22, 59): 2, (60, 60): 2, (35, 60): -2, (61, 61): 2, (48, 61): -2, (62, 62): 1, (62, 63): 4, (59, 62): -2, (60, 62): -2, (61, 62): -2, (63, 63): 5, (59, 63): -4, (60, 63): -4, (61, 63): -4, (59, 60): 2, (59, 61): 2, (60, 61): 2, (64, 64): 2, (53, 64): -2, (58, 65): 2, (66, 66): 2, (63, 66): -2, (67, 67): 1, (64, 67): -2, (65, 67): -2, (66, 67): -2, (64, 65): 2, (64, 66): 2, (65, 66): 2}

Answer 1

[Walter Roberson]

Copying to an Answer... turns out that in context the solution was a bit easier than was originally asked about.

S = '{(0, 0): -8, (0, 1): 2, (0, 2): 2, (0, 3): 2, (0, 4): 2, (0, 5): 2, (0, 6): 2, (0, 7): 2, (0, 8): 4, (0, 9): 8, (1, 1): -12, (1, 2): 2, (1, 3): 2, (1, 4): 2, (1, 5): 2, (1, 6): 2, (1, 7): 2, (1, 8): 4, (1, 9): 8, (2, 2): -10, (2, 3): 2, (2, 4): 2, (2, 5): 2, (2, 6): 2, (2, 7): 2, (2, 8): 4, (2, 9): 8, (3, 3): -8, (3, 4): 2, (3, 5): 2, (3, 6): 2, (3, 7): 2, (3, 8): 4, (3, 9): 8, (4, 4): -8, (4, 5): 2, (4, 6): 2, (4, 7): 2, (4, 8): 4, (4, 9): 8, (5, 5): -10, (5, 6): 2, (5, 7): 2, (5, 8): 4, (5, 9): 8, (6, 6): -8, (6, 7): 2, (6, 8): 4, (6, 9): 8, (7, 7): -9, (8, 8): -16, (9, 9): -24, (7, 8): 4, (7, 9): 8, (8, 9): 16, (10, 10): 58.0, (0, 10): -2, (1, 11): 2, (11, 11): 56.0, (2, 12): 2, (12, 12): 56.0, (13, 13): 58.0, (3, 13): -2, (14, 14): 58.0, (4, 14): -2, (15, 15): 58.0, (5, 15): -2, (16, 16): 58.0, (6, 16): -2, (17, 17): -55.0, (17, 18): 4, (17, 19): 8, (17, 20): 16, (17, 21): 32, (17, 22): 64, (10, 17): -2, (11, 17): -2, (12, 17): -2, (13, 17): -2, (14, 17): -2, (15, 17): -2, (16, 17): -2, (18, 18): -108.0, (18, 19): 16, (18, 20): 32, (18, 21): 64, (18, 22): 128, (10, 18): -4, (11, 18): -4, (12, 18): -4, (13, 18): -4, (14, 18): -4, (15, 18): -4, (16, 18): -4, (19, 19): -208.0, (19, 20): 64, (19, 21): 128, (19, 22): 256, (10, 19): -8, (11, 19): -8, (12, 19): -8, (13, 19): -8, (14, 19): -8, (15, 19): -8, (16, 19): -8, (20, 20): -384.0, (20, 21): 256, (20, 22): 512, (10, 20): -16, (11, 20): -16, (12, 20): -16, (13, 20): -16, (14, 20): -16, (15, 20): -16, (16, 20): -16, (21, 21): -640.0, (21, 22): 1024, (10, 21): -32, (11, 21): -32, (12, 21): -32, (13, 21): -32, (14, 21): -32, (15, 21): -32, (16, 21): -32, (22, 22): -771.0, (10, 22): -64, (11, 22): -64, (12, 22): -64, (13, 22): -64, (14, 22): -64, (15, 22): -64, (16, 22): -64, (10, 11): 2, (10, 12): 2, (10, 13): 2, (10, 14): 2, (10, 15): 2, (10, 16): 2, (11, 12): 2, (11, 13): 2, (11, 14): 2, (11, 15): 2, (11, 16): 2, (12, 13): 2, (12, 14): 2, (12, 15): 2, (12, 16): 2, (13, 14): 2, (13, 15): 2, (13, 16): 2, (14, 15): 2, (14, 16): 2, (15, 16): 2, (23, 23): 60.0, (0, 23): -2, (1, 24): 2, (24, 24): 58.0, (2, 25): 2, (25, 25): 58.0, (26, 26): 60.0, (3, 26): -2, (4, 27): 2, (27, 27): 58.0, (5, 28): 2, (28, 28): 58.0, (29, 29): 60.0, (6, 29): -2, (30, 30): -57.0, (30, 31): 4, (30, 32): 8, (30, 33): 16, (30, 34): 32, (30, 35): 64, (23, 30): -2, (24, 30): -2, (25, 30): -2, (26, 30): -2, (27, 30): -2, (28, 30): -2, (29, 30): -2, (31, 31): -112.0, (31, 32): 16, (31, 33): 32, (31, 34): 64, (31, 35): 128, (23, 31): -4, (24, 31): -4, (25, 31): -4, (26, 31): -4, (27, 31): -4, (28, 31): -4, (29, 31): -4, (32, 32): -216.0, (32, 33): 64, (32, 34): 128, (32, 35): 256, (23, 32): -8, (24, 32): -8, (25, 32): -8, (26, 32): -8, (27, 32): -8, (28, 32): -8, (29, 32): -8, (33, 33): -400.0, (33, 34): 256, (33, 35): 512, (23, 33): -16, (24, 33): -16, (25, 33): -16, (26, 33): -16, (27, 33): -16, (28, 33): -16, (29, 33): -16, (34, 34): -672.0, (34, 35): 1024, (23, 34): -32, (24, 34): -32, (25, 34): -32, (26, 34): -32, (27, 34): -32, (28, 34): -32, (29, 34): -32, (35, 35): -829.0, (23, 35): -64, (24, 35): -64, (25, 35): -64, (26, 35): -64, (27, 35): -64, (28, 35): -64, (29, 35): -64, (23, 24): 2, (23, 25): 2, (23, 26): 2, (23, 27): 2, (23, 28): 2, (23, 29): 2, (24, 25): 2, (24, 26): 2, (24, 27): 2, (24, 28): 2, (24, 29): 2, (25, 26): 2, (25, 27): 2, (25, 28): 2, (25, 29): 2, (26, 27): 2, (26, 28): 2, (26, 29): 2, (27, 28): 2, (27, 29): 2, (28, 29): 2, (0, 36): 2, (36, 36): 54.0, (1, 37): 2, (37, 37): 54.0, (38, 38): 56.0, (2, 38): -2, (3, 39): 2, (39, 39): 54.0, (40, 40): 56.0, (4, 40): -2, (5, 41): 2, (41, 41): 54.0, (6, 42): 2, (42, 42): 54.0, (43, 43): -53.0, (43, 44): 4, (43, 45): 8, (43, 46): 16, (43, 47): 32, (43, 48): 64, (36, 43): -2, (37, 43): -2, (38, 43): -2, (39, 43): -2, (40, 43): -2, (41, 43): -2, (42, 43): -2, (44, 44): -104.0, (44, 45): 16, (44, 46): 32, (44, 47): 64, (44, 48): 128, (36, 44): -4, (37, 44): -4, (38, 44): -4, (39, 44): -4, (40, 44): -4, (41, 44): -4, (42, 44): -4, (45, 45): -200.0, (45, 46): 64, (45, 47): 128, (45, 48): 256, (36, 45): -8, (37, 45): -8, (38, 45): -8, (39, 45): -8, (40, 45): -8, (41, 45): -8, (42, 45): -8, (46, 46): -368.0, (46, 47): 256, (46, 48): 512, (36, 46): -16, (37, 46): -16, (38, 46): -16, (39, 46): -16, (40, 46): -16, (41, 46): -16, (42, 46): -16, (47, 47): -608.0, (47, 48): 1024, (36, 47): -32, (37, 47): -32, (38, 47): -32, (39, 47): -32, (40, 47): -32, (41, 47): -32, (42, 47): -32, (48, 48): -703.0, (36, 48): -64, (37, 48): -64, (38, 48): -64, (39, 48): -64, (40, 48): -64, (41, 48): -64, (42, 48): -64, (36, 37): 2, (36, 38): 2, (36, 39): 2, (36, 40): 2, (36, 41): 2, (36, 42): 2, (37, 38): 2, (37, 39): 2, (37, 40): 2, (37, 41): 2, (37, 42): 2, (38, 39): 2, (38, 40): 2, (38, 41): 2, (38, 42): 2, (39, 40): 2, (39, 41): 2, (39, 42): 2, (40, 41): 2, (40, 42): 2, (41, 42): 2, (22, 49): 2, (50, 50): 2, (35, 50): -2, (48, 51): 2, (52, 52): 1, (52, 53): 4, (49, 52): -2, (50, 52): -2, (51, 52): -2, (53, 53): 5, (49, 53): -4, (50, 53): -4, (51, 53): -4, (49, 50): 2, (49, 51): 2, (50, 51): 2, (22, 54): 2, (55, 55): 2, (35, 55): -2, (56, 56): 2, (48, 56): -2, (57, 57): 1, (57, 58): 4, (54, 57): -2, (55, 57): -2, (56, 57): -2, (58, 58): 3, (54, 58): -4, (55, 58): -4, (56, 58): -4, (54, 55): 2, (54, 56): 2, (55, 56): 2, (22, 59): 2, (60, 60): 2, (35, 60): -2, (61, 61): 2, (48, 61): -2, (62, 62): 1, (62, 63): 4, (59, 62): -2, (60, 62): -2, (61, 62): -2, (63, 63): 5, (59, 63): -4, (60, 63): -4, (61, 63): -4, (59, 60): 2, (59, 61): 2, (60, 61): 2, (64, 64): 2, (53, 64): -2, (58, 65): 2, (66, 66): 2, (63, 66): -2, (67, 67): 1, (64, 67): -2, (65, 67): -2, (66, 67): -2, (64, 65): 2, (64, 66): 2, (65, 66): 2}'

S = '{(0, 0): -8, (0, 1): 2, (0, 2): 2, (0, 3): 2, (0, 4): 2, (0, 5): 2, (0, 6): 2, (0, 7): 2, (0, 8): 4, (0, 9): 8, (1, 1): -12, (1, 2): 2, (1, 3): 2, (1, 4): 2, (1, 5): 2, (1, 6): 2, (1, 7): 2, (1, 8): 4, (1, 9): 8, (2, 2): -10, (2, 3): 2, (2, 4): 2, (2, 5): 2, (2, 6): 2, (2, 7): 2, (2, 8): 4, (2, 9): 8, (3, 3): -8, (3, 4): 2, (3, 5): 2, (3, 6): 2, (3, 7): 2, (3, 8): 4, (3, 9): 8, (4, 4): -8, (4, 5): 2, (4, 6): 2, (4, 7): 2, (4, 8): 4, (4, 9): 8, (5, 5): -10, (5, 6): 2, (5, 7): 2, (5, 8): 4, (5, 9): 8, (6, 6): -8, (6, 7): 2, (6, 8): 4, (6, 9): 8, (7, 7): -9, (8, 8): -16, (9, 9): -24, (7, 8): 4, (7, 9): 8, (8, 9): 16, (10, 10): 58.0, (0, 10): -2, (1, 11): 2, (11, 11): 56.0, (2, 12): 2, (12, 12): 56.0, (13, 13): 58.0, (3, 13): -2, (14, 14): 58.0, (4, 14): -2, (15, 15): 58.0, (5, 15): -2, (16, 16): 58.0, (6, 16): -2, (17, 17): -55.0, (17, 18): 4, (17, 19): 8, (17, 20): 16, (17, 21): 32, (17, 22): 64, (10, 17): -2, (11, 17): -2, (12, 17): -2, (13, 17): -2, (14, 17): -2, (15, 17): -2, (16, 17): -2, (18, 18): -108.0, (18, 19): 16, (18, 20): 32, (18, 21): 64, (18, 22): 128, (10, 18): -4, (11, 18): -4, (12, 18): -4, (13, 18): -4, (14, 18): -4, (15, 18): -4, (16, 18): -4, (19, 19): -208.0, (19, 20): 64, (19, 21): 128, (19, 22): 256, (10, 19): -8, (11, 19): -8, (12, 19): -8, (13, 19): -8, (14, 19): -8, (15, 19): -8, (16, 19): -8, (20, 20): -384.0, (20, 21): 256, (20, 22): 512, (10, 20): -16, (11, 20): -16, (12, 20): -16, (13, 20): -16, (14, 20): -16, (15, 20): -16, (16, 20): -16, (21, 21): -640.0, (21, 22): 1024, (10, 21): -32, (11, 21): -32, (12, 21): -32, (13, 21): -32, (14, 21): -32, (15, 21): -32, (16, 21): -32, (22, 22): -771.0, (10, 22): -64, (11, 22): -64, (12, 22): -64, (13, 22): -64, (14, 22): -64, (15, 22): -64, (16, 22): -64, (10, 11): 2, (10, 12): 2, (10, 13): 2, (10, 14): 2, (10, 15): 2, (10, 16): 2, (11, 12): 2, (11, 13): 2, (11, 14): 2, (11, 15): 2, (11, 16): 2, (12, 13): 2, (12, 14): 2, (12, 15): 2, (12, 16): 2, (13, 14): 2, (13, 15): 2, (13, 16): 2, (14, 15): 2, (14, 16): 2, (15, 16): 2, (23, 23): 60.0, (0, 23): -2, (1, 24): 2, (24, 24): 58.0, (2, 25): 2, (25, 25): 58.0, (26, 26): 60.0, (3, 26): -2, (4, 27): 2, (27, 27): 58.0, (5, 28): 2, (28, 28): 58.0, (29, 29): 60.0, (6, 29): -2, (30, 30): -57.0, (30, 31): 4, (30, 32): 8, (30, 33): 16, (30, 34): 32, (30, 35): 64, (23, 30): -2, (24, 30): -2, (25, 30): -2, (26, 30): -2, (27, 30): -2, (28, 30): -2, (29, 30): -2, (31, 31): -112.0, (31, 32): 16, (31, 33): 32, (31, 34): 64, (31, 35): 128, (23, 31): -4, (24, 31): -4, (25, 31): -4, (26, 31): -4, (27, 31): -4, (28, 31): -4, (29, 31): -4, (32, 32): -216.0, (32, 33): 64, (32, 34): 128, (32, 35): 256, (23, 32): -8, (24, 32): -8, (25, 32): -8, (26, 32): -8, (27, 32): -8, (28, 32): -8, (29, 32): -8, (33, 33): -400.0, (33, 34): 256, (33, 35): 512, (23, 33): -16, (24, 33): -16, (25, 33): -16, (26, 33): -16, (27, 33): -16, (28, 33): -16, (29, 33): -16, (34, 34): -672.0, (34, 35): 1024, (23, 34): -32, (24, 34): -32, (25, 34): -32, (26, 34): -32, (27, 34): -32, (28, 34): -32, (29, 34): -32, (35, 35): -829.0, (23, 35): -64, (24, 35): -64, (25, 35): -64, (26, 35): -64, (27, 35): -64, (28, 35): -64, (29, 35): -64, (23, 24): 2, (23, 25): 2, (23, 26): 2, (23, 27): 2, (23, 28): 2, (23, 29): 2, (24, 25): 2, (24, 26): 2, (24, 27): 2, (24, 28): 2, (24, 29): 2, (25, 26): 2, (25, 27): 2, (25, 28): 2, (25, 29): 2, (26, 27): 2, (26, 28): 2, (26, 29): 2, (27, 28): 2, (27, 29): 2, (28, 29): 2, (0, 36): 2, (36, 36): 54.0, (1, 37): 2, (37, 37): 54.0, (38, 38): 56.0, (2, 38): -2, (3, 39): 2, (39, 39): 54.0, (40, 40): 56.0, (4, 40): -2, (5, 41): 2, (41, 41): 54.0, (6, 42): 2, (42, 42): 54.0, (43, 43): -53.0, (43, 44): 4, (43, 45): 8, (43, 46): 16, (43, 47): 32, (43, 48): 64, (36, 43): -2, (37, 43): -2, (38, 43): -2, (39, 43): -2, (40, 43): -2, (41, 43): -2, (42, 43): -2, (44, 44): -104.0, (44, 45): 16, (44, 46): 32, (44, 47): 64, (44, 48): 128, (36, 44): -4, (37, 44): -4, (38, 44): -4, (39, 44): -4, (40, 44): -4, (41, 44): -4, (42, 44): -4, (45, 45): -200.0, (45, 46): 64, (45, 47): 128, (45, 48): 256, (36, 45): -8, (37, 45): -8, (38, 45): -8, (39, 45): -8, (40, 45): -8, (41, 45): -8, (42, 45): -8, (46, 46): -368.0, (46, 47): 256, (46, 48): 512, (36, 46): -16, (37, 46): -16, (38, 46): -16, (39, 46): -16, (40, 46): -16, (41, 46): -16, (42, 46): -16, (47, 47): -608.0, (47, 48): 1024, (36, 47): -32, (37, 47): -32, (38, 47): -32, (39, 47): -32, (40, 47): -32, (41, 47): -32, (42, 47): -32, (48, 48): -703.0, (36, 48): -64, (37, 48): -64, (38, 48): -64, (39, 48): -64, (40, 48): -64, (41, 48): -64, (42, 48): -64, (36, 37): 2, (36, 38): 2, (36, 39): 2, (36, 40): 2, (36, 41): 2, (36, 42): 2, (37, 38): 2, (37, 39): 2, (37, 40): 2, (37, 41): 2, (37, 42): 2, (38, 39): 2, (38, 40): 2, (38, 41): 2, (38, 42): 2, (39, 40): 2, (39, 41): 2, (39, 42): 2, (40, 41): 2, (40, 42): 2, (41, 42): 2, (22, 49): 2, (50, 50): 2, (35, 50): -2, (48, 51): 2, (52, 52): 1, (52, 53): 4, (49, 52): -2, (50, 52): -2, (51, 52): -2, (53, 53): 5, (49, 53): -4, (50, 53): -4, (51, 53): -4, (49, 50): 2, (49, 51): 2, (50, 51): 2, (22, 54): 2, (55, 55): 2, (35, 55): -2, (56, 56): 2, (48, 56): -2, (57, 57): 1, (57, 58): 4, (54, 57): -2, (55, 57): -2, (56, 57): -2, (58, 58): 3, (54, 58): -4, (55, 58): -4, (56, 58): -4, (54, 55): 2, (54, 56): 2, (55, 56): 2, (22, 59): 2, (60, 60): 2, (35, 60): -2, (61, 61): 2, (48, 61): -2, (62, 62): 1, (62, 63): 4, (59, 62): -2, (60, 62): -2, (61, 62): -2, (63, 63): 5, (59, 63): -4, (60, 63): -4, (61, 63): -4, (59, 60): 2, (59, 61): 2, (60, 61): 2, (64, 64): 2, (53, 64): -2, (58, 65): 2, (66, 66): 2, (63, 66): -2, (67, 67): 1, (64, 67): -2, (65, 67): -2, (66, 67): -2, (64, 65): 2, (64, 66): 2, (65, 66): 2}'

parts = regexp(S, '(?<c1>\d+),\s+(?<c2>\d+)\):\s+(?<val>[^,\}]+)', 'names')

parts = 1×411 struct array with fields:
    c1
    c2
    val

all_c1 = str2double({parts.c1})

all_c1 = 1×411

0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 3 3 3

all_c2 = str2double({parts.c2})

all_c2 = 1×411

0 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 2 3 4 5 6 7 8 9 3 4 5

all_val = str2double({parts.val})

all_val = 1×411

-8 2 2 2 2 2 2 2 4 8 -12 2 2 2 2 2 2 4 8 -10 2 2 2 2 2 4 8 -8 2 2

Answer 2

[DGM]

Since it was never clarified, I'm going to ignore sci/eng notation:

str = '[phone] 100.1 100.001 1.001 .001 100.';
B = str2double(regexp(str,'[+-]?(\d*\.)?\d+','match'))

B = 1×8

100.0000 -100.0000 100.0000 100.1000 100.0010 1.0010 0.0010 100.0000

Note how this will behave on things which are not decimal expressions:

str = '11.22.33.44.55';
B = str2double(regexp(str,'[+-]?(\d*\.)?\d+','match'))

B = 1×4

11.2200 0.3300 0.4400 0.5500

I'm sure it can be more robust, but it's a start.

[Walter Roberson]

The match on 100. is accidental, ending the match before the period.

[DGM]

I realized that, but I don't see the reason that the trailing . needs to be matched. The desired output is numeric, so 100 and 100. would be converted the same anyway.

Is there something I'm missing?

[Walter Roberson]

It mostly matters if the person need to match something immediately afterdwards.

[DGM]

Without knowing more specifics about what OP needs, is there a better expression to use for the assumptions thus far made? I just take these questions as an opportunity to exercise. I'm still learning regex myself.

[Walter Roberson]

str = '[phone] 100.1 100.001 1.001 .001 100. -.5';
regexp(str, '([-+]?\d+(\.\d*)?)|([-+]?\.\d+)', 'match')

ans = 1×9 cell array
    {'+100'}    {'-100'}    {'100'}    {'100.1'}    {'100.001'}    {'1.001'}    {'.001'}    {'100.'}    {'-.5'}

[Stephen23]

str = '[phone] 100.1 100.001 1.001 .001 100. -.5';
regexp(str, '[-+]?(\d+\.?\d*|\.\d+)', 'match')

ans = 1×9 cell array
    {'+100'}    {'-100'}    {'100'}    {'100.1'}    {'100.001'}    {'1.001'}    {'.001'}    {'100.'}    {'-.5'}

[Walter Roberson]

That does look more compact.

str = '[phone] 100.1 100.001 1.001 .001 100. -.5';
regexp(str, '[-+]?(\d+(\.\d*)?|\.\d+)', 'match')

ans = 1×9 cell array
    {'+100'}    {'-100'}    {'100'}    {'100.1'}    {'100.001'}    {'1.001'}    {'.001'}    {'100.'}    {'-.5'}

Not much difference, but as a matter of style if the . is not present, I prefer not to make it work with the \d* after that.

[Nadatimuj]

I am sorry I couldn't respond soooner. This is something that I want to read. This is standard QUBO format used by D-wave and quantum machines, where the parenthesis has the indices and the other values are the co-efficients which can be positive, negative, floats etc. For example: it can be -250.556

{(0, 0): -8, (0, 1): 2, (0, 2): 2, (0, 3): 2, (0, 4): 2, (0, 5): 2, (0, 6): 2, (0, 7): 2, (0, 8): 4, (0, 9): 8, (1, 1): -12, (1, 2): 2, (1, 3): 2, (1, 4): 2, (1, 5): 2, (1, 6): 2, (1, 7): 2, (1, 8): 4, (1, 9): 8, (2, 2): -10, (2, 3): 2, (2, 4): 2, (2, 5): 2, (2, 6): 2, (2, 7): 2, (2, 8): 4, (2, 9): 8, (3, 3): -8, (3, 4): 2, (3, 5): 2, (3, 6): 2, (3, 7): 2, (3, 8): 4, (3, 9): 8, (4, 4): -8, (4, 5): 2, (4, 6): 2, (4, 7): 2, (4, 8): 4, (4, 9): 8, (5, 5): -10, (5, 6): 2, (5, 7): 2, (5, 8): 4, (5, 9): 8, (6, 6): -8, (6, 7): 2, (6, 8): 4, (6, 9): 8, (7, 7): -9, (8, 8): -16, (9, 9): -24, (7, 8): 4, (7, 9): 8, (8, 9): 16, (10, 10): 58.0, (0, 10): -2, (1, 11): 2, (11, 11): 56.0, (2, 12): 2, (12, 12): 56.0, (13, 13): 58.0, (3, 13): -2, (14, 14): 58.0, (4, 14): -2, (15, 15): 58.0, (5, 15): -2, (16, 16): 58.0, (6, 16): -2, (17, 17): -55.0, (17, 18): 4, (17, 19): 8, (17, 20): 16, (17, 21): 32, (17, 22): 64, (10, 17): -2, (11, 17): -2, (12, 17): -2, (13, 17): -2, (14, 17): -2, (15, 17): -2, (16, 17): -2, (18, 18): -108.0, (18, 19): 16, (18, 20): 32, (18, 21): 64, (18, 22): 128, (10, 18): -4, (11, 18): -4, (12, 18): -4, (13, 18): -4, (14, 18): -4, (15, 18): -4, (16, 18): -4, (19, 19): -208.0, (19, 20): 64, (19, 21): 128, (19, 22): 256, (10, 19): -8, (11, 19): -8, (12, 19): -8, (13, 19): -8, (14, 19): -8, (15, 19): -8, (16, 19): -8, (20, 20): -384.0, (20, 21): 256, (20, 22): 512, (10, 20): -16, (11, 20): -16, (12, 20): -16, (13, 20): -16, (14, 20): -16, (15, 20): -16, (16, 20): -16, (21, 21): -640.0, (21, 22): 1024, (10, 21): -32, (11, 21): -32, (12, 21): -32, (13, 21): -32, (14, 21): -32, (15, 21): -32, (16, 21): -32, (22, 22): -771.0, (10, 22): -64, (11, 22): -64, (12, 22): -64, (13, 22): -64, (14, 22): -64, (15, 22): -64, (16, 22): -64, (10, 11): 2, (10, 12): 2, (10, 13): 2, (10, 14): 2, (10, 15): 2, (10, 16): 2, (11, 12): 2, (11, 13): 2, (11, 14): 2, (11, 15): 2, (11, 16): 2, (12, 13): 2, (12, 14): 2, (12, 15): 2, (12, 16): 2, (13, 14): 2, (13, 15): 2, (13, 16): 2, (14, 15): 2, (14, 16): 2, (15, 16): 2, (23, 23): 60.0, (0, 23): -2, (1, 24): 2, (24, 24): 58.0, (2, 25): 2, (25, 25): 58.0, (26, 26): 60.0, (3, 26): -2, (4, 27): 2, (27, 27): 58.0, (5, 28): 2, (28, 28): 58.0, (29, 29): 60.0, (6, 29): -2, (30, 30): -57.0, (30, 31): 4, (30, 32): 8, (30, 33): 16, (30, 34): 32, (30, 35): 64, (23, 30): -2, (24, 30): -2, (25, 30): -2, (26, 30): -2, (27, 30): -2, (28, 30): -2, (29, 30): -2, (31, 31): -112.0, (31, 32): 16, (31, 33): 32, (31, 34): 64, (31, 35): 128, (23, 31): -4, (24, 31): -4, (25, 31): -4, (26, 31): -4, (27, 31): -4, (28, 31): -4, (29, 31): -4, (32, 32): -216.0, (32, 33): 64, (32, 34): 128, (32, 35): 256, (23, 32): -8, (24, 32): -8, (25, 32): -8, (26, 32): -8, (27, 32): -8, (28, 32): -8, (29, 32): -8, (33, 33): -400.0, (33, 34): 256, (33, 35): 512, (23, 33): -16, (24, 33): -16, (25, 33): -16, (26, 33): -16, (27, 33): -16, (28, 33): -16, (29, 33): -16, (34, 34): -672.0, (34, 35): 1024, (23, 34): -32, (24, 34): -32, (25, 34): -32, (26, 34): -32, (27, 34): -32, (28, 34): -32, (29, 34): -32, (35, 35): -829.0, (23, 35): -64, (24, 35): -64, (25, 35): -64, (26, 35): -64, (27, 35): -64, (28, 35): -64, (29, 35): -64, (23, 24): 2, (23, 25): 2, (23, 26): 2, (23, 27): 2, (23, 28): 2, (23, 29): 2, (24, 25): 2, (24, 26): 2, (24, 27): 2, (24, 28): 2, (24, 29): 2, (25, 26): 2, (25, 27): 2, (25, 28): 2, (25, 29): 2, (26, 27): 2, (26, 28): 2, (26, 29): 2, (27, 28): 2, (27, 29): 2, (28, 29): 2, (0, 36): 2, (36, 36): 54.0, (1, 37): 2, (37, 37): 54.0, (38, 38): 56.0, (2, 38): -2, (3, 39): 2, (39, 39): 54.0, (40, 40): 56.0, (4, 40): -2, (5, 41): 2, (41, 41): 54.0, (6, 42): 2, (42, 42): 54.0, (43, 43): -53.0, (43, 44): 4, (43, 45): 8, (43, 46): 16, (43, 47): 32, (43, 48): 64, (36, 43): -2, (37, 43): -2, (38, 43): -2, (39, 43): -2, (40, 43): -2, (41, 43): -2, (42, 43): -2, (44, 44): -104.0, (44, 45): 16, (44, 46): 32, (44, 47): 64, (44, 48): 128, (36, 44): -4, (37, 44): -4, (38, 44): -4, (39, 44): -4, (40, 44): -4, (41, 44): -4, (42, 44): -4, (45, 45): -200.0, (45, 46): 64, (45, 47): 128, (45, 48): 256, (36, 45): -8, (37, 45): -8, (38, 45): -8, (39, 45): -8, (40, 45): -8, (41, 45): -8, (42, 45): -8, (46, 46): -368.0, (46, 47): 256, (46, 48): 512, (36, 46): -16, (37, 46): -16, (38, 46): -16, (39, 46): -16, (40, 46): -16, (41, 46): -16, (42, 46): -16, (47, 47): -608.0, (47, 48): 1024, (36, 47): -32, (37, 47): -32, (38, 47): -32, (39, 47): -32, (40, 47): -32, (41, 47): -32, (42, 47): -32, (48, 48): -703.0, (36, 48): -64, (37, 48): -64, (38, 48): -64, (39, 48): -64, (40, 48): -64, (41, 48): -64, (42, 48): -64, (36, 37): 2, (36, 38): 2, (36, 39): 2, (36, 40): 2, (36, 41): 2, (36, 42): 2, (37, 38): 2, (37, 39): 2, (37, 40): 2, (37, 41): 2, (37, 42): 2, (38, 39): 2, (38, 40): 2, (38, 41): 2, (38, 42): 2, (39, 40): 2, (39, 41): 2, (39, 42): 2, (40, 41): 2, (40, 42): 2, (41, 42): 2, (22, 49): 2, (50, 50): 2, (35, 50): -2, (48, 51): 2, (52, 52): 1, (52, 53): 4, (49, 52): -2, (50, 52): -2, (51, 52): -2, (53, 53): 5, (49, 53): -4, (50, 53): -4, (51, 53): -4, (49, 50): 2, (49, 51): 2, (50, 51): 2, (22, 54): 2, (55, 55): 2, (35, 55): -2, (56, 56): 2, (48, 56): -2, (57, 57): 1, (57, 58): 4, (54, 57): -2, (55, 57): -2, (56, 57): -2, (58, 58): 3, (54, 58): -4, (55, 58): -4, (56, 58): -4, (54, 55): 2, (54, 56): 2, (55, 56): 2, (22, 59): 2, (60, 60): 2, (35, 60): -2, (61, 61): 2, (48, 61): -2, (62, 62): 1, (62, 63): 4, (59, 62): -2, (60, 62): -2, (61, 62): -2, (63, 63): 5, (59, 63): -4, (60, 63): -4, (61, 63): -4, (59, 60): 2, (59, 61): 2, (60, 61): 2, (64, 64): 2, (53, 64): -2, (58, 65): 2, (66, 66): 2, (63, 66): -2, (67, 67): 1, (64, 67): -2, (65, 67): -2, (66, 67): -2, (64, 65): 2, (64, 66): 2, (65, 66): 2}

[Walter Roberson]

S = '{(0, 0): -8, (0, 1): 2, (0, 2): 2, (0, 3): 2, (0, 4): 2, (0, 5): 2, (0, 6): 2, (0, 7): 2, (0, 8): 4, (0, 9): 8, (1, 1): -12, (1, 2): 2, (1, 3): 2, (1, 4): 2, (1, 5): 2, (1, 6): 2, (1, 7): 2, (1, 8): 4, (1, 9): 8, (2, 2): -10, (2, 3): 2, (2, 4): 2, (2, 5): 2, (2, 6): 2, (2, 7): 2, (2, 8): 4, (2, 9): 8, (3, 3): -8, (3, 4): 2, (3, 5): 2, (3, 6): 2, (3, 7): 2, (3, 8): 4, (3, 9): 8, (4, 4): -8, (4, 5): 2, (4, 6): 2, (4, 7): 2, (4, 8): 4, (4, 9): 8, (5, 5): -10, (5, 6): 2, (5, 7): 2, (5, 8): 4, (5, 9): 8, (6, 6): -8, (6, 7): 2, (6, 8): 4, (6, 9): 8, (7, 7): -9, (8, 8): -16, (9, 9): -24, (7, 8): 4, (7, 9): 8, (8, 9): 16, (10, 10): 58.0, (0, 10): -2, (1, 11): 2, (11, 11): 56.0, (2, 12): 2, (12, 12): 56.0, (13, 13): 58.0, (3, 13): -2, (14, 14): 58.0, (4, 14): -2, (15, 15): 58.0, (5, 15): -2, (16, 16): 58.0, (6, 16): -2, (17, 17): -55.0, (17, 18): 4, (17, 19): 8, (17, 20): 16, (17, 21): 32, (17, 22): 64, (10, 17): -2, (11, 17): -2, (12, 17): -2, (13, 17): -2, (14, 17): -2, (15, 17): -2, (16, 17): -2, (18, 18): -108.0, (18, 19): 16, (18, 20): 32, (18, 21): 64, (18, 22): 128, (10, 18): -4, (11, 18): -4, (12, 18): -4, (13, 18): -4, (14, 18): -4, (15, 18): -4, (16, 18): -4, (19, 19): -208.0, (19, 20): 64, (19, 21): 128, (19, 22): 256, (10, 19): -8, (11, 19): -8, (12, 19): -8, (13, 19): -8, (14, 19): -8, (15, 19): -8, (16, 19): -8, (20, 20): -384.0, (20, 21): 256, (20, 22): 512, (10, 20): -16, (11, 20): -16, (12, 20): -16, (13, 20): -16, (14, 20): -16, (15, 20): -16, (16, 20): -16, (21, 21): -640.0, (21, 22): 1024, (10, 21): -32, (11, 21): -32, (12, 21): -32, (13, 21): -32, (14, 21): -32, (15, 21): -32, (16, 21): -32, (22, 22): -771.0, (10, 22): -64, (11, 22): -64, (12, 22): -64, (13, 22): -64, (14, 22): -64, (15, 22): -64, (16, 22): -64, (10, 11): 2, (10, 12): 2, (10, 13): 2, (10, 14): 2, (10, 15): 2, (10, 16): 2, (11, 12): 2, (11, 13): 2, (11, 14): 2, (11, 15): 2, (11, 16): 2, (12, 13): 2, (12, 14): 2, (12, 15): 2, (12, 16): 2, (13, 14): 2, (13, 15): 2, (13, 16): 2, (14, 15): 2, (14, 16): 2, (15, 16): 2, (23, 23): 60.0, (0, 23): -2, (1, 24): 2, (24, 24): 58.0, (2, 25): 2, (25, 25): 58.0, (26, 26): 60.0, (3, 26): -2, (4, 27): 2, (27, 27): 58.0, (5, 28): 2, (28, 28): 58.0, (29, 29): 60.0, (6, 29): -2, (30, 30): -57.0, (30, 31): 4, (30, 32): 8, (30, 33): 16, (30, 34): 32, (30, 35): 64, (23, 30): -2, (24, 30): -2, (25, 30): -2, (26, 30): -2, (27, 30): -2, (28, 30): -2, (29, 30): -2, (31, 31): -112.0, (31, 32): 16, (31, 33): 32, (31, 34): 64, (31, 35): 128, (23, 31): -4, (24, 31): -4, (25, 31): -4, (26, 31): -4, (27, 31): -4, (28, 31): -4, (29, 31): -4, (32, 32): -216.0, (32, 33): 64, (32, 34): 128, (32, 35): 256, (23, 32): -8, (24, 32): -8, (25, 32): -8, (26, 32): -8, (27, 32): -8, (28, 32): -8, (29, 32): -8, (33, 33): -400.0, (33, 34): 256, (33, 35): 512, (23, 33): -16, (24, 33): -16, (25, 33): -16, (26, 33): -16, (27, 33): -16, (28, 33): -16, (29, 33): -16, (34, 34): -672.0, (34, 35): 1024, (23, 34): -32, (24, 34): -32, (25, 34): -32, (26, 34): -32, (27, 34): -32, (28, 34): -32, (29, 34): -32, (35, 35): -829.0, (23, 35): -64, (24, 35): -64, (25, 35): -64, (26, 35): -64, (27, 35): -64, (28, 35): -64, (29, 35): -64, (23, 24): 2, (23, 25): 2, (23, 26): 2, (23, 27): 2, (23, 28): 2, (23, 29): 2, (24, 25): 2, (24, 26): 2, (24, 27): 2, (24, 28): 2, (24, 29): 2, (25, 26): 2, (25, 27): 2, (25, 28): 2, (25, 29): 2, (26, 27): 2, (26, 28): 2, (26, 29): 2, (27, 28): 2, (27, 29): 2, (28, 29): 2, (0, 36): 2, (36, 36): 54.0, (1, 37): 2, (37, 37): 54.0, (38, 38): 56.0, (2, 38): -2, (3, 39): 2, (39, 39): 54.0, (40, 40): 56.0, (4, 40): -2, (5, 41): 2, (41, 41): 54.0, (6, 42): 2, (42, 42): 54.0, (43, 43): -53.0, (43, 44): 4, (43, 45): 8, (43, 46): 16, (43, 47): 32, (43, 48): 64, (36, 43): -2, (37, 43): -2, (38, 43): -2, (39, 43): -2, (40, 43): -2, (41, 43): -2, (42, 43): -2, (44, 44): -104.0, (44, 45): 16, (44, 46): 32, (44, 47): 64, (44, 48): 128, (36, 44): -4, (37, 44): -4, (38, 44): -4, (39, 44): -4, (40, 44): -4, (41, 44): -4, (42, 44): -4, (45, 45): -200.0, (45, 46): 64, (45, 47): 128, (45, 48): 256, (36, 45): -8, (37, 45): -8, (38, 45): -8, (39, 45): -8, (40, 45): -8, (41, 45): -8, (42, 45): -8, (46, 46): -368.0, (46, 47): 256, (46, 48): 512, (36, 46): -16, (37, 46): -16, (38, 46): -16, (39, 46): -16, (40, 46): -16, (41, 46): -16, (42, 46): -16, (47, 47): -608.0, (47, 48): 1024, (36, 47): -32, (37, 47): -32, (38, 47): -32, (39, 47): -32, (40, 47): -32, (41, 47): -32, (42, 47): -32, (48, 48): -703.0, (36, 48): -64, (37, 48): -64, (38, 48): -64, (39, 48): -64, (40, 48): -64, (41, 48): -64, (42, 48): -64, (36, 37): 2, (36, 38): 2, (36, 39): 2, (36, 40): 2, (36, 41): 2, (36, 42): 2, (37, 38): 2, (37, 39): 2, (37, 40): 2, (37, 41): 2, (37, 42): 2, (38, 39): 2, (38, 40): 2, (38, 41): 2, (38, 42): 2, (39, 40): 2, (39, 41): 2, (39, 42): 2, (40, 41): 2, (40, 42): 2, (41, 42): 2, (22, 49): 2, (50, 50): 2, (35, 50): -2, (48, 51): 2, (52, 52): 1, (52, 53): 4, (49, 52): -2, (50, 52): -2, (51, 52): -2, (53, 53): 5, (49, 53): -4, (50, 53): -4, (51, 53): -4, (49, 50): 2, (49, 51): 2, (50, 51): 2, (22, 54): 2, (55, 55): 2, (35, 55): -2, (56, 56): 2, (48, 56): -2, (57, 57): 1, (57, 58): 4, (54, 57): -2, (55, 57): -2, (56, 57): -2, (58, 58): 3, (54, 58): -4, (55, 58): -4, (56, 58): -4, (54, 55): 2, (54, 56): 2, (55, 56): 2, (22, 59): 2, (60, 60): 2, (35, 60): -2, (61, 61): 2, (48, 61): -2, (62, 62): 1, (62, 63): 4, (59, 62): -2, (60, 62): -2, (61, 62): -2, (63, 63): 5, (59, 63): -4, (60, 63): -4, (61, 63): -4, (59, 60): 2, (59, 61): 2, (60, 61): 2, (64, 64): 2, (53, 64): -2, (58, 65): 2, (66, 66): 2, (63, 66): -2, (67, 67): 1, (64, 67): -2, (65, 67): -2, (66, 67): -2, (64, 65): 2, (64, 66): 2, (65, 66): 2}'

S = '{(0, 0): -8, (0, 1): 2, (0, 2): 2, (0, 3): 2, (0, 4): 2, (0, 5): 2, (0, 6): 2, (0, 7): 2, (0, 8): 4, (0, 9): 8, (1, 1): -12, (1, 2): 2, (1, 3): 2, (1, 4): 2, (1, 5): 2, (1, 6): 2, (1, 7): 2, (1, 8): 4, (1, 9): 8, (2, 2): -10, (2, 3): 2, (2, 4): 2, (2, 5): 2, (2, 6): 2, (2, 7): 2, (2, 8): 4, (2, 9): 8, (3, 3): -8, (3, 4): 2, (3, 5): 2, (3, 6): 2, (3, 7): 2, (3, 8): 4, (3, 9): 8, (4, 4): -8, (4, 5): 2, (4, 6): 2, (4, 7): 2, (4, 8): 4, (4, 9): 8, (5, 5): -10, (5, 6): 2, (5, 7): 2, (5, 8): 4, (5, 9): 8, (6, 6): -8, (6, 7): 2, (6, 8): 4, (6, 9): 8, (7, 7): -9, (8, 8): -16, (9, 9): -24, (7, 8): 4, (7, 9): 8, (8, 9): 16, (10, 10): 58.0, (0, 10): -2, (1, 11): 2, (11, 11): 56.0, (2, 12): 2, (12, 12): 56.0, (13, 13): 58.0, (3, 13): -2, (14, 14): 58.0, (4, 14): -2, (15, 15): 58.0, (5, 15): -2, (16, 16): 58.0, (6, 16): -2, (17, 17): -55.0, (17, 18): 4, (17, 19): 8, (17, 20): 16, (17, 21): 32, (17, 22): 64, (10, 17): -2, (11, 17): -2, (12, 17): -2, (13, 17): -2, (14, 17): -2, (15, 17): -2, (16, 17): -2, (18, 18): -108.0, (18, 19): 16, (18, 20): 32, (18, 21): 64, (18, 22): 128, (10, 18): -4, (11, 18): -4, (12, 18): -4, (13, 18): -4, (14, 18): -4, (15, 18): -4, (16, 18): -4, (19, 19): -208.0, (19, 20): 64, (19, 21): 128, (19, 22): 256, (10, 19): -8, (11, 19): -8, (12, 19): -8, (13, 19): -8, (14, 19): -8, (15, 19): -8, (16, 19): -8, (20, 20): -384.0, (20, 21): 256, (20, 22): 512, (10, 20): -16, (11, 20): -16, (12, 20): -16, (13, 20): -16, (14, 20): -16, (15, 20): -16, (16, 20): -16, (21, 21): -640.0, (21, 22): 1024, (10, 21): -32, (11, 21): -32, (12, 21): -32, (13, 21): -32, (14, 21): -32, (15, 21): -32, (16, 21): -32, (22, 22): -771.0, (10, 22): -64, (11, 22): -64, (12, 22): -64, (13, 22): -64, (14, 22): -64, (15, 22): -64, (16, 22): -64, (10, 11): 2, (10, 12): 2, (10, 13): 2, (10, 14): 2, (10, 15): 2, (10, 16): 2, (11, 12): 2, (11, 13): 2, (11, 14): 2, (11, 15): 2, (11, 16): 2, (12, 13): 2, (12, 14): 2, (12, 15): 2, (12, 16): 2, (13, 14): 2, (13, 15): 2, (13, 16): 2, (14, 15): 2, (14, 16): 2, (15, 16): 2, (23, 23): 60.0, (0, 23): -2, (1, 24): 2, (24, 24): 58.0, (2, 25): 2, (25, 25): 58.0, (26, 26): 60.0, (3, 26): -2, (4, 27): 2, (27, 27): 58.0, (5, 28): 2, (28, 28): 58.0, (29, 29): 60.0, (6, 29): -2, (30, 30): -57.0, (30, 31): 4, (30, 32): 8, (30, 33): 16, (30, 34): 32, (30, 35): 64, (23, 30): -2, (24, 30): -2, (25, 30): -2, (26, 30): -2, (27, 30): -2, (28, 30): -2, (29, 30): -2, (31, 31): -112.0, (31, 32): 16, (31, 33): 32, (31, 34): 64, (31, 35): 128, (23, 31): -4, (24, 31): -4, (25, 31): -4, (26, 31): -4, (27, 31): -4, (28, 31): -4, (29, 31): -4, (32, 32): -216.0, (32, 33): 64, (32, 34): 128, (32, 35): 256, (23, 32): -8, (24, 32): -8, (25, 32): -8, (26, 32): -8, (27, 32): -8, (28, 32): -8, (29, 32): -8, (33, 33): -400.0, (33, 34): 256, (33, 35): 512, (23, 33): -16, (24, 33): -16, (25, 33): -16, (26, 33): -16, (27, 33): -16, (28, 33): -16, (29, 33): -16, (34, 34): -672.0, (34, 35): 1024, (23, 34): -32, (24, 34): -32, (25, 34): -32, (26, 34): -32, (27, 34): -32, (28, 34): -32, (29, 34): -32, (35, 35): -829.0, (23, 35): -64, (24, 35): -64, (25, 35): -64, (26, 35): -64, (27, 35): -64, (28, 35): -64, (29, 35): -64, (23, 24): 2, (23, 25): 2, (23, 26): 2, (23, 27): 2, (23, 28): 2, (23, 29): 2, (24, 25): 2, (24, 26): 2, (24, 27): 2, (24, 28): 2, (24, 29): 2, (25, 26): 2, (25, 27): 2, (25, 28): 2, (25, 29): 2, (26, 27): 2, (26, 28): 2, (26, 29): 2, (27, 28): 2, (27, 29): 2, (28, 29): 2, (0, 36): 2, (36, 36): 54.0, (1, 37): 2, (37, 37): 54.0, (38, 38): 56.0, (2, 38): -2, (3, 39): 2, (39, 39): 54.0, (40, 40): 56.0, (4, 40): -2, (5, 41): 2, (41, 41): 54.0, (6, 42): 2, (42, 42): 54.0, (43, 43): -53.0, (43, 44): 4, (43, 45): 8, (43, 46): 16, (43, 47): 32, (43, 48): 64, (36, 43): -2, (37, 43): -2, (38, 43): -2, (39, 43): -2, (40, 43): -2, (41, 43): -2, (42, 43): -2, (44, 44): -104.0, (44, 45): 16, (44, 46): 32, (44, 47): 64, (44, 48): 128, (36, 44): -4, (37, 44): -4, (38, 44): -4, (39, 44): -4, (40, 44): -4, (41, 44): -4, (42, 44): -4, (45, 45): -200.0, (45, 46): 64, (45, 47): 128, (45, 48): 256, (36, 45): -8, (37, 45): -8, (38, 45): -8, (39, 45): -8, (40, 45): -8, (41, 45): -8, (42, 45): -8, (46, 46): -368.0, (46, 47): 256, (46, 48): 512, (36, 46): -16, (37, 46): -16, (38, 46): -16, (39, 46): -16, (40, 46): -16, (41, 46): -16, (42, 46): -16, (47, 47): -608.0, (47, 48): 1024, (36, 47): -32, (37, 47): -32, (38, 47): -32, (39, 47): -32, (40, 47): -32, (41, 47): -32, (42, 47): -32, (48, 48): -703.0, (36, 48): -64, (37, 48): -64, (38, 48): -64, (39, 48): -64, (40, 48): -64, (41, 48): -64, (42, 48): -64, (36, 37): 2, (36, 38): 2, (36, 39): 2, (36, 40): 2, (36, 41): 2, (36, 42): 2, (37, 38): 2, (37, 39): 2, (37, 40): 2, (37, 41): 2, (37, 42): 2, (38, 39): 2, (38, 40): 2, (38, 41): 2, (38, 42): 2, (39, 40): 2, (39, 41): 2, (39, 42): 2, (40, 41): 2, (40, 42): 2, (41, 42): 2, (22, 49): 2, (50, 50): 2, (35, 50): -2, (48, 51): 2, (52, 52): 1, (52, 53): 4, (49, 52): -2, (50, 52): -2, (51, 52): -2, (53, 53): 5, (49, 53): -4, (50, 53): -4, (51, 53): -4, (49, 50): 2, (49, 51): 2, (50, 51): 2, (22, 54): 2, (55, 55): 2, (35, 55): -2, (56, 56): 2, (48, 56): -2, (57, 57): 1, (57, 58): 4, (54, 57): -2, (55, 57): -2, (56, 57): -2, (58, 58): 3, (54, 58): -4, (55, 58): -4, (56, 58): -4, (54, 55): 2, (54, 56): 2, (55, 56): 2, (22, 59): 2, (60, 60): 2, (35, 60): -2, (61, 61): 2, (48, 61): -2, (62, 62): 1, (62, 63): 4, (59, 62): -2, (60, 62): -2, (61, 62): -2, (63, 63): 5, (59, 63): -4, (60, 63): -4, (61, 63): -4, (59, 60): 2, (59, 61): 2, (60, 61): 2, (64, 64): 2, (53, 64): -2, (58, 65): 2, (66, 66): 2, (63, 66): -2, (67, 67): 1, (64, 67): -2, (65, 67): -2, (66, 67): -2, (64, 65): 2, (64, 66): 2, (65, 66): 2}'

parts = regexp(S, '(?<c1>\d+),\s+(?<c2>\d+)\):\s+(?<val>[^,\}]+)', 'names')

parts = 1×411 struct array with fields:
    c1
    c2
    val

all_c1 = str2double({parts.c1})

all_c1 = 1×411

0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 3 3 3

all_c2 = str2double({parts.c2})

all_c2 = 1×411

0 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 2 3 4 5 6 7 8 9 3 4 5

all_val = str2double({parts.val})

all_val = 1×411

-8 2 2 2 2 2 2 2 4 8 -12 2 2 2 2 2 2 4 8 -10 2 2 2 2 2 4 8 -8 2 2

[Nadatimuj]

@Walter Roberson wonderful, thanks a lot. I was doing it with a for loop but you have vectorized it which is great. Now I can easily generate a sparse matrix using the indices and value. How do I accept this answer? Clickng the accept on the top of this entire comment thread?

[Walter Roberson]

I copied into an Answer.

[DGM]

I didn't even think of using an OR.

From a beginner's perspective, regex feels like a swiss army knife with so many blades that you end up just using the knife blade as a screwdriver because you can't remember which one was the screwdriver blade.