How to Assign vectors to each dynamic variable name?

Asked by Vinay Killamsetty on 25 Sep 2019

Latest activity Commented on by Guillaume on 25 Sep 2019

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Firstly I want to create variable names like z1,z2,..,Zn with n decided by the user

I have an array A of size n*n

I want to assign each row of the array A to each variable

Z1 should contain 1st column of A

Z2 must contain 2nd column of A

Can anyone advice how to do this with some simple method.

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Products

MATLAB

Release

R2019b

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Answer by Jan on 25 Sep 2019

Don't do this.

See: TUTORIAL: How and why to avoid Eval

Hiding an index in the name of variables is a bad idea. Use arrays instead and real indices. Having a matrix is effecient already. Using A(:, k) is much smarter and faster than creating a bunch of variables called A<k>.

This topic is discussed almost every day and a typicial problem of beginners.

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Jan on 25 Sep 2019

"I tried to use cftool for curve fitting each column vector of array A. But it didnt allow"

Please post the code and the error message. I'm convinced that creating a set of different variables is not necessary.

Matt J on 25 Sep 2019

"I tried to use cftool for curve fitting each column vector of array A. But it didnt allow"

cftool is just a GUI for the fit command. For your situation, you should just call fit() directly, in a loop,

for i=1:size(A,2)
    
    cfit(i)= fit(x,A(:,i),fitType);
    
end

Guillaume on 25 Sep 2019

I tried to do something and it didn't work... so instead of asking how to do something you're asking how to do something else entirely which will not help one bit with the original problem.

See XY problem.

Products

MATLAB

Release

R2019b

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Vinay Killamsetty (view profile)