MATLAB: Rename workspace variables

MATLABvariables change nameworkspace

I have two .mat's that each have a list of vectors with the same name. I want to rename the variables of the first .mat to originalname_Ref, and then save all vectors in one .mat. But how do I change the names of the workspace vectors?

Best Answer

When you load the .mat file, load it to a variable:

x = load('mymat.mat');
names = fieldnames(x)
for iname = 1:length(names)
  x.(['new_', names{iname}]) = x.(names{iname});
  x = rmfield(x, names{iname});
end
save('newmymat.mat', '-struct', 's');

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Hi Moonman, what is x?

>>whos x

If it is a structure, then feed soundsc() the appropriate field

soundsc(x.data,8000)

or whatever the field is.

MATLAB: Is there a load if statement or similar in matlab, way to save workspace variable’s seperate mat files

This creates a list of currently defined variables:

List = who;

Then omit ans:

List(strcmp(List, 'ans')) = [];

And save the others:

for k = 1:length(List)
  save(List{k});
end

Then this bunch of files can be loaded without overwriting existing variables:

matList = dir('*.mat');
List = who;
for k = 1:length(matList)
  name = matList(k).name;
  if ~any(strcmp(name, List))
    load(name);
  end
end

But I would avoid this consequently: 1. load without catching the input to a variable is prone to errors. 2. The debugging of your program will be impeded by this method, because it conceals the source of the values.

Best Answer

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