saving multiple output of each iteration of for loop

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Sara
Sara 2018-7-17
编辑： Matt J 2018-7-17
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

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Matt J
Matt J 2018-7-17
编辑：Matt J 2018-7-17
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

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