MATLAB: Find the first incidence of 1 in a logical vector and replace all other 1s by zero

first incidencereplace logical values on conditions

I need to find the first incidence of 1 in a logical vector and replace all other 1s by zero.

For example, I have a logical vector like this: V = [ 0 1 0 0 1 0 1 ] and I need a function/code that will tell me that will yield V=[0 1 0 0 0 0 0]..

Since I am having a matrix (10000,35) size, how to run this code for each row?

Best Answer

 Wanted = (cumsum(matrix, 2) == 1) .* matrix

Related Solutions

MATLAB: Find first value and repalce values following it

A = [1 1 1
1 1 1
0 1 1
1 1 0
1 1 1
0 0 1];
cumprod(A)

MATLAB: Copy values from a vector to a matrix

sami - if

 A = [1     1     1
      1     1     1
      1     1     1
      0     0     1
      0     0     1
      0     0     1];

and

 V = [0;10;20;30;40;50;60;70;80;90;100;110;120];

then try

 A(A>0) = V(2:end);

In the above, A>0 returns a logical matrix of ones and zeros where a one indicates that the element of A is greater than zero (as per our condition) and zero indicates that the element of A is less than or equal to zero. A(A>0) is then just those non-zero elements of A. We then assign all of the non-zero values of V (so from index two onwards) to those elements of A that are non-zero.

Best Answer

Related Solutions

MATLAB: Find first value and repalce values following it

MATLAB: Copy values from a vector to a matrix

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