Using conditional IF statement

I have a matrix A and I generate B=randi([0,1],7,3).I want C=A*B only if sum of each row of B=1..I tried this..

     A=[1  0  0  1  0  1  1
        0  1  1  1  0  0  1
        1  0  0  1  1  0  0
        1  0  0  0  1  0  1
        1  1  0  0  0  1  0
        0  1  0  0  0  1  1]
  for k=1:numIterations
     B=randi([0,1],7,3);
        if sum(B,2)==1;
            C=A*B;
        end 
   end

how to use IF condition in this case?

[Walter Roberson]

What do you want to have happen if the condition is met multiple times within the "for k" loop? You are overwriting all of C each time.

[summyia qamar]

thankyou..I skipped C(k)

Answer 1

[Roger Stafford]

if all(sum(B,2)==1)

[summyia qamar]

I tried this.

A=[1  0  0  1  0  1  1
        0  1  1  1  0  0  1
        1  0  0  1  1  0  0
        1  0  0  0  1  0  1
        1  1  0  0  0  1  0
        0  1  0  0  0  1  1];
  for k=1:numIterations
     B=randi([0,1],7,3);
        if all(sum(B,2)==1)
            C=A*B
        end 
  end
   [B C(ones(7,1))]

and result is C =

       1     2     1
       0     4     0
       2     1     0
       2     1     0
       1     1     1
       0     2     1

ans =

       0     0     1     1
       1     0     0     1
       1     0     1     1
       1     1     0     1
       1     0     1     1
       1     0     0     1
       0     0     1     1

row 3 is not upto the condition

Answer 2

[Steven Lord]

Don't generate B randomly, or at least not the way you're generating it. Your constraint on B is that each row must have exactly one nonzero value. So generate the index of the column in each row that contains the nonzero value and use that to generate a B matrix that is guaranteed to satisfy your constraint.

numRows = 10;
numCols = 5;
rowind = (1:numRows).';
colind = randi(numCols, numRows, 1);
B = accumarray([rowind, colind], 1, [numRows, numCols]);
check = all(sum(B, 2) == 1)

The sz input to accumarray is necessary for the (unlikely) case where no row has a 1 in the last column, to ensure B is the correct size.