How to change a variable name without changing the value itself?

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Antonio Victoria
Antonio Victoria 2023-6-10
回答： Antonio Victoria 2023-6-13
I've got some variables like these: OutArray, OutArray2 and so on...
I need to refresh the base name OutArray adding the "1", "2", "3"... taking advantage of the loop iterator, how may I do it?
I have MATLAB R2023A

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采纳的回答

Image Analyst
Image Analyst 2023-6-10
编辑：Image Analyst 2023-6-10
Just do them one at a time, reassiging existing variables to variables with your new, preferred names. Then you can clear the old-named variables from memory with clear if you want.
newname1 = OutArray;
newName2 = OutArray2;
newName3 = OutArray3;
newName4 = OutArray4;
clear('OutArray', 'OutArray2', 'OutArray3', 'OutArray4');
Surely you don't have more than a handful of those variables. If you do (big mistake), then see this
TUTORIAL: Why Variables Should Not Be Named Dynamically (eval) -
for reasons why not to do that.
FAQ: https://matlab.fandom.com/wiki/FAQ#How_can_I_create_variables_A1,_A2,...,_A10_in_a_loop?
If you have tons of variable names because they are columns of a big table you read in from a file, then consider converting them all to a 2-D array with the table2array function.

更多回答（4 个）

Star Strider
Star Strider 2023-6-10
Save them as elements of a cell array instead, when you first create them.
chicken vector
chicken vector 2023-6-10
This is in general not recommend because is prone tu bugs and affects code readibility.
If you really want to do this anyway, have a look at genvarname and eval.
claudio
claudio 2023-6-10
编辑：claudio 2023-6-10
The easy way
variables = ["OutArray" "OutArray2" "OutArray3"];
for kk = 1:numel(variables)
eval(variables(kk) + string(kk) + " = eval(variables(kk))");
clear(variables(kk))
end
A more refined way
variables = string(who); % retrieve the name of the variables from workspace
% without having to write them by hand
for kk = 1:numel(variables)
eval(variables(kk) + string(kk) + " = eval(variables(kk))");
clear(variables(kk))
end
  1 个评论
John D'Errico
John D'Errico 2023-6-10
编辑：John D'Errico 2023-6-10
Neither of those ways is at all refined. And neither of them are a remotely good idea. They will lead to crappy, buggy, and SLOW code, when a simple array was all that was ever needed. Is there even a remotely good reason to recommend this? NO.

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Antonio Victoria
Antonio Victoria 2023-6-13
Thank you all for your answers!

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