Rename a variable using a string

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Calvin Ebert 2019-3-22

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https://ww2.mathworks.cn/matlabcentral/answers/451793-rename-a-variable-using-a-string

编辑： Calvin Ebert 2019-3-25

Ok ok, I see everyone says to not create dynamic variables and all but I am trying to do something specific, if there is another method, Ill gladly accept it.

I have some mat files saved with tables, all the same type just different "Machines" on each different file.

I want to use a function to do things with those tables and save them with the same name. Here is what I have:

function DoStuff(Name)
Name=strcat(Name, 'TheRestOfTheFileName')
load('Folder', Name) %This puts the variable in the workspace with its own name
NewVar=load('Folder', Name)
NewVar=NewVar.(Name) %This creates a new variable with the data from the old one.

I want it this way so I can do the same process to all of the files just by changing the name and running it through this function.

Now after running stuff, I want it to save to the same place with the same name

I was thinking about saving over the original variable since I can use save('Folder', Name) and I have tried assignin('base', Name, NewVar) with no luck.

Can anyone suggest a way to do this?

I am thinking since this function will be in another, I can just call the result from DoStuff, then manually set and save it. Hopefully works but would be good to know a method for this either way

Thank you very much

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Answer 1

Stephen23 2019-3-22

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https://ww2.mathworks.cn/matlabcentral/answers/451793-rename-a-variable-using-a-string#answer_366907

编辑：Stephen23 2019-3-22

在 MATLAB Online 中打开

"Rename a variable using a string"

Why bother? Both load and save work with scalar structures, which makes your task easy:

S = load(filename)
V = S.(name)
... do stuff with V
S.(name) = V;
save(filename,'-struct',S)

Or skip assigning to V and just work with S.(name) directly. You might also find other load and save options useful (e.g. specifying fields to import/save): read the documentation carefully!