save variable with changing name

Hello Matlabers,

I have a very easy question, but I can't seem to figure it out. I want to do the same calculation hundreds of times and save the output with a variable name that changes with each loop. Specifically, I want to do the following:

z_1 = .5.*log((1+r_1)./(1-r_1)); and then save as z_1

z_2 = .5.*log((1+r_2)./(1-r_2)); and then save as z_2

z_3 = .5.*log((1+r_3)./(1-r_3)); and then save as z_3

and so on...

any help would be much appreciated, thanks!

[Stephen23]

Just save your data in one array using indexing. Indexing is simple, easy to debug, and very efficient.

https://www.mathworks.com/help/matlab/matlab_prog/string-evaluation.html

https://www.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not-be-named-dynamically-eval

[Amy]

Okay great thank you. I will use a cell array instead. So I'm going to use something like the following:

numArrays = 676;

a = cell(numArrays,1);

for n = 1:numArrays

A{n} = .5.*log((1+r_1)./(1-r_1));

end

I'm still not sure how to change the variable from r_1 to r_2 to r_3, etc. in each loop. sorry for the naive question!

[Steven Lord]

Don't use r_1, r_2, etc. either.

numArrays = 677;
r = rand(1, numArrays); % Random data for demonstration purposes
z = 0.5*log((1+r)./(1-r));

This generates all the data at once; no loop, no variables named iteratively. Where in your code you would have used z_17 (for example) instead use z(17).