How do I combine digits in different cells to create one cell containing one number made up of the digits??

I have selected the digits from a string, e.g. a = 1 2 3 7 8 9 1 2 3 4 5 6, and I now want to combine a selection of the digit entries to create a reduced array of numbers made up of the digits, e.g. A = [123789, 123456]. How can I do this??

Answer 1

[Jan]

1. If "a" is a string (synonym for CHAR vector in Matlab):

a = '123789123456';
A = sscanf(a, '%6d');  % Read an integer with 6 characters

2. If "a" is a cell string:

a = {'1', '2', '3', '7', '8', '9', '1', '2', '3', '4', '5', '6'};

make it a string at first and apply the above method:

a = [a{:}];

3. Or is "a" a numerical vector?

a = [1 2 3 7 8 9 1 2 3 4 5 6];
b = transpose(reshape(a, 6, 2));  % [EDITED] Thanks Andrei!
A = b * transpose(10 .^ (5:-1:0));

[Andrei Bobrov]

a = [1 2 3 7 8 9 1 2 3 4 5 6]

a2 = char(reshape(a,6,[])'+'0')

a3 = reshape(a,6,[])'*10.^(numel(a)/2-1:-1:0)'

[Andrei Bobrov]

Hi Jan! typo in '3.'

a = [1 2 3 7 8 9 1 2 3 4 5 6];

b = reshape(a, 6,2)';

A = b * transpose(10 .^ (5:-1:0));

[Jan]

@Andrei: We have present 7 different methods, you've check my solutions, found a bug, I've edited it, you have removed your former solution (if I remember correctly).

This is a nice example for inefficient working: Currently the inputs are not well defined...