How to fill a preallocated matrix with function output?
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Hi there.
I've preallocated a zeros(10,4) matrix. I'm trying to store the result or "fill" each row with the output of another function (that I didn't write). The output of the function is a 1x4 array (i.e. [1 2 3 4]). I effectively want to replace each row with "ans" but I know that's just not cool.
I assume this is done by concatenation... However, the best I can do is add to the array... but there's still the 10x4 zeros below it. Is there a way to do it with indices/for loop? I'm up for whatever's easiest.
example:
A = zeros(10,4) and my 1x4 output = [1 2 3 4]
How would I replace A's first row with [1 2 3 4] without just "adding" to it?
Thanks!
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Accepted Answer
Roger Stafford
on 29 Jun 2014
Edited: Roger Stafford
on 29 Jun 2014
A(r,:) = [1 2 3 4];
or
A(r,:) = 1x4 output of function
These place the 1x4 array in the r-th row.
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