Data splitting and saving to different variables
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How to split a matrix data column wise and saving each column in different variable using loop. say M is a 3*8 matrix. I want to store these data of M columnwise into a 8 different column matrix, m1,m2,m3,m4,m5,m6,m7 and m8.
2 件のコメント
Stephen23
2022 年 7 月 4 日
"I want to store these data of M columnwise into a 8 different column matrix, m1,m2,m3,m4,m5,m6,m7 and m8."
You can certainly do that, if you want to force yourself into writing slow, complex, inefficient, obfuscated, insecure, buggy code that is hard to debug:
In contrast, indexing is simple and very efficient. So far you have not given any reason why you cannot use indexing.
回答 (2 件)
Johan
2022 年 7 月 4 日
You can use structure to do that, you can read more about it in the matlab help https://fr.mathworks.com/help/matlab/ref/struct.html
here is an example for your specific question:
M = rand(3,8)
m(1:8) = struct('data',[]);
for i_col = 1:size(M,2)
m(i_col).data = M(:,i_col);
end
m.data
% Note that splitting that little data in structured arrays is not very
% efficient
whos M
whos m
3 件のコメント
dpb
2022 年 7 月 4 日
And, for good measure, with the table, OP gets the desired variable names coming along "for free"...
Steven Lord
2022 年 7 月 4 日
Can you dynamically create variables with numbered names like x1, x2, x3, etc.? Yes.
Should you do this? The general consensus is no. That Answers post explains why this is generally discouraged and offers several alternative approaches.
0 件のコメント
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