How to read and save different variables in a matfile to another mat file

How to read two specific variables from a .mat file having different variables and save it to another .mat file without changing the variable name.

Answer 1

[Stephen23]

S = load('file1.mat','var1','var2');
save('file2.mat','-struct','S')

OR

S = load('file1.mat');
save('file2.mat','-struct','S','var1','var2')

[sachin k p]

Hi Stephen, Thank you. This code is saving the variables from a mat file(1) to another mat file(2), but the existing variables in the mat file(2) is getting deleted. How can I do this without deleting the existing variables.

[Stephen23]

@sachin k p: if you want to keep all existing variables in the destination .mat file, then you might need to rename some variables. So you need to decide what you want:

• keep the variable names to stay the same (as you wrote in your question), or
• keep all of the existing data (as you wrote in your comment) ?

[sachin k p]

the destiantion mat file(2) consist of one variable which is not similar (variable name is also different) to the variables read from the other matfile(1). How to keep this variable in the matfile(2) and add the other two variables from matfile(1)

[Stephen23]

@sachin k p: if the names are different then you could try the '-append' option, like this:

S = load('file1.mat','var1','var2');
save('file2.mat','-struct','S','-append')

[sachin k p]

Thank you Stephen