MATLAB: How to count the number of consecutive identical element of each row in a binary matrix

Question

Matrix A contains only binary numbers: A=[0,0,0,0,1,1,0,0;1,0,1,1,1,1,0,0;0,1,1,0,1,0,0,1]

A =  0 0 0 0 1 1 0 0
     1 0 1 1 1 1 0 0
     0 1 1 0 1 0 0 1

I want to count the number of consecutive elements of each row (use first row as an example) in this way:

[1st consecutive 0, 2nd consecutive 0, 3rd consecutive 0, 4th consecutive 0, 1st consecutive 1, 2nd consecutive 1, 1st consecutive 0, 2nd consecutive 0]

So the output is

B = 1 2 3 4 1 2 1 2
    1 1 1 2 3 4 1 2
    1 1 2 1 1 1 2 1

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The methods I found are all for an array:

https://ww2.mathworks.cn/matlabcentral/answers/118828-how-to-count-the-number-of-consecutive-numbers-of-the-same-value-in-an-array

For example:

A= [0,0,0,0,1,1,0,0];
i = find(diff(A)) ;
n = [i numel(A)] - [0 i];
c = arrayfun(@(X) 1:X, n , 'un',0);
B = cat(2,c{:})

Output is

B = 1     2     3     4     1     2     1     2

How can I do this for a matrix (without using for)?

Answer 1

A =  [0 0 0 0 1 1 0 0;
     1 0 1 1 1 1 0 0;
     0 1 1 0 1 0 0 1]
 
m = size(A,1);
B = A';
b = [true(1,m); diff(B)~=0];
[r,~] = find(b);
B(~b) = 1;
B(b) = [1; 1-diff(r)];
B(1,:) = 1;
B = cumsum(B)'