dynamic matrix with changing variable name in for loop

Question

Birsen Ayaz-Maierhafer 2022-9-20

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1808910-dynamic-matrix-with-changing-variable-name-in-for-loop

编辑： Stephen23 2022-9-21

Hi,

I want to rename each matrix in a loop. There are two variable 'mat" and "ser". I tried the code below. Did not work. Any recommendations? Thank you

E_list=[ 1.2E-4, 1.2E-3, 1.2E-2, 1.2E-1, 1, 10, 100]
mat='Glass'
ser=24
for i=1:size(E_list)-1
    ..... Some calculations to get objective and popt below
     ......
    ([mat,'_parameters_',num2str(ser)])(i,1)=E_list(i)
    ([mat,'_parameters_',num2str(ser)])(i,2))=objective(popt) 
    ([mat,'_parameters_',num2str(ser)])(i,3:6))=popt % Parameters
    
end

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Stephen23 2022-9-21

编辑：Stephen23 2022-9-21

Forcing numbers (e.g. "ser") into variable names is a sign that you are doing something wrong.

Forcing meta-data (e.g. "Glass") into variable names is a sign that you are doing something wrong.

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

Meta-data is data, and data belongs in variables, not in variable names.

MATLAB is designed to work simply and efficiently using indexing. You should use indexing.

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Answer 1

James Tursa 2022-9-20

0
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1808910-dynamic-matrix-with-changing-variable-name-in-for-loop#answer_1057430

Do not dynamically name variables. This is bad programming practice and will leave you with hard-to-use variables downstream in your code. Instead, use cell arrays or struct arrays etc. See this link for more discussion:

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