# How to build a row vector with a loop?

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Karen Smith on 28 Jul 2022
Commented: Voss on 29 Jul 2022
Hello everyone, I am a beginner to matlab and I need help trying to build a row vector on matlab. I have a variable NL that is changed manually each time, but I need y0 to match in this fashion.
For example, if NL=2, y0= [1 0]. y0 should be the length of NL, but the first element should be a 1.
Here is another example, if NL=4, y0= [1 0 0 0].
I would like to be able to do this with a for loop for an arbitrary value of NL, here is my code so far.
Can anyone help me with this please?
Thank you.
Voss on 29 Jul 2022
Yes. Or vectorized --
NL = 8;
y0([1 NL]) = [1 0];
y0
y0 = 1×8
1 0 0 0 0 0 0 0
clear y0
y0([NL 1]) = [0 1];
y0
y0 = 1×8
1 0 0 0 0 0 0 0

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