saving multiple output of each iteration of for loop

I am writing a for loop and each iteration has one column and lets say m rows. How to save the output of all iterations in a single column vector.

Thanks for your help.

my code is something like that:

a = 1000*4 double
b = 1500*1
  for i = size(b)
x = find(a(:,4))==b(i)
end

Answer 1

[Matt J]

You wouldn't want x to be a (numeric) column vector, because find() may not return a scalar. A numeric vector x can only put scalars into each x(i). However, a cell array is a possibility:

   N=numel(b);
   x=cell(N,1);

    for i = 1:N  %Edited typo

     x{i} = find( a(:,4) == b(i) );

    end

[Dennis]

I like the solution, but i think it has a small typo:

for i= 1:N

[Sara]

Dear Matt,

Thanks for your help.