How can I store index number and value from a for loop and a problem with optimization

My problem is two-fold;

I am attempting to store the minimum value from each row of a matrix that is 3x4193 in dimensions;

    for i = 1:3

      tmp(i) = rand;    
      dummy(i,:) =(abs(tmp(i) - cumsum_pdf_x));
      [val ind] = min(dummy(i,:));

    end

I have used to above code but it only gives me min value and corresponding index for one of the rows. How can I get and store the values for all three? Also I then have to increase i to 2915, how can I optimize my code so that it does this easily as it is at the moment causing matlab to crash?

Many thanks in advance :D

Answer 1

[Azzi Abdelmalek]

for i = 1:3
  tmp(i) = rand;
  dummy(i,:) =abs(tmp(i) - cumsum_pdf_x);
  [val1 ind1] = min(dummy(i,:));
  val(i)=val1;
  ind(i)=ind1
end

Answer 2

[Matt J]

Do the minimization outside the loop, in vectorized fashion.

for i = 1:3
  tmp(i) = rand;
  dummy(i,:) =abs(tmp(i) - cumsum_pdf_x);
end

 [val,ind] = min(dummy,[],2);

As for the "crash", we need to see error messages to diagnose that.