Loop with different outcome name

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Yeeun Son
Yeeun Son 2020-10-19
评论： Stephen23 2020-10-19
Hi,
I'm trying to create a loop that gives me outcomes with different names
For example,
for x=1:3
y=x+2
end
This code gives me y=3, y=4, y=5
But I want to change my code so that it gives me something like
y1=3, y2=4, y3=5
so that I would be able to know which y corresponds to which x values later.
Is there anyway to acheive this?
Many thanks in advance!
  1 个评论
Stephen23
Stephen23 2020-10-19
"But I want to change my code so that it gives me something like y1=3, y2=4, y3=5"
That would be about the worst approach to storing data. Read this to know why:
https://www.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not-be-named-dynamically-eval
The simple, neat, and very efficient MATLAB approach is to use indexing. You should use indexing too.

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Ameer Hamza
Ameer Hamza 2020-10-19
编辑：Ameer Hamza 2020-10-19
Creating variable names like y1, y2, ... is not a good coding practice and highly non-recommended: https://www.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not-be-named-dynamically-eval. A better approach is to use array
y = zeros(1, 3)
for x = 1:3
y(i) = x+2
end
Then access values using indexing
y(1) % access first element
Read about indexing in MATLAB: https://www.mathworks.com/company/newsletters/articles/matrix-indexing-in-matlab.html
Also, note that your for-loop can be vectorized
x = 1:3;
y = x+2;

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