identifying and isolating consecutive numbers

2 views (last 30 days)
I found the following questions in Matlab which is similar to mine
I have a vector, for example, A= [1 2 3 4 14 15 23 24 25 ]
and I want a code that will identify regions of consecutive numbers and separate them into their own array. ie, a code that will split A into
B = [1 2 3 4] C = [14 15] D = [23 24 25]
I would like this code to be able to work on a matrix A of variable length. Any suggestions?
..................I tryed an answer that worked in the first place but then was giviing me an error. The answer and the error are below
MATLAB ANSWER:
A= [1 2 3 4 14 15 23 24 25 ]
A = 1x9
1 2 3 4 14 15 23 24 25
assert(size(A,1)==1 && isa(A,'double'));
p=find(diff(A)>1);
ind=[A(1),A(p+1);A(p),A(end)]
ind = 2x3
1 14 23 4 15 25
% ind =
% 1 14 23
% 4 15 25
ERROR
Operands to the logical AND (&&) and OR (||) operators must be convertible to
logical scalar values. Use the ANY or ALL functions to reduce operands to logical
scalar values.
...
What could I do to rectify please? Thanks

Accepted Answer

Matt J
Matt J on 16 Feb 2024
Edited: Matt J on 17 Feb 2024
code that will split A into B = [1 2 3 4] C = [14 15] D = [23 24 25]
It would be a bad idea to split A into separate variables, but you can split it in cell array form as follows:
A= [1 2 3 4 14 15 23 24 25 ];
D=find( diff([A,inf])~=1 );
Asplit=mat2cell(A,1,[D(1), diff(D) ] ) ; %the final result
Asplit{:}
ans = 1×4
1 2 3 4
ans = 1×2
14 15
ans = 1×3
23 24 25
  1 Comment
Dyuman Joshi
Dyuman Joshi on 17 Feb 2024
A similar approach -
A = [1 2 3 4 14 15 23 24 25];
idx = [find(diff(A)~=1) numel(A)];
out = mat2cell(A, 1, [idx(1) diff(idx)])
out = 1x3 cell array
{[1 2 3 4]} {[14 15]} {[23 24 25]}

Sign in to comment.

More Answers (0)

Categories

Find more on Data Type Conversion in Help Center and File Exchange

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!