How can I change the name of a variable and assign to it the name of a mat file?

I am loading a mat file and making some changes to it and then I want to save the new matrix by using the name of the mat file. The code I am using is:

load LRWW.mat

for i=2002:-1:1141
  LRWW(i)=[]; 
end

for i=1:140
  LRWW(1)=[]; 
end

for i=2:51
  LRWW(i)=[]; 
end

matname = ['D:\MATLAB\\LRWW.mat'];
save(matname,'LRWW');

So far so good. My problem is that I need to do this for many mat files. Every time I have to change the name (LRWW in this example) manually. Is there a way to automate the procedure?

Thank you very much

[Image Analyst]

See the FAQ

Answer 1

[Jan]

YourFolder = 'D:\MATLAB\';
List = dir(fullfile(YourFolder, '*.mat'));
for iList = 1:numel(List)
  aFile    = fullfile(YourFolder, List{iList}.name);
  FileData = load(aFile);
  Field    = fieldnames(FileData);
  FileData.(Field{1})[1:140, 142:191, 1141:2002] = [];
  save(aFile, '-struct', 'Data');
end

[Claire]

It seems to work. Thanks!

Answer 2

[Azzi Abdelmalek]

for k=1:10
filename{k}=sprintf('file%d',k)
end

Will generate file1, file2,...,file10

[Claire]

Thanks for your answer but that is not what I was looking for. What I am asking is how can I use the name of the mat file (here LRWW) in the rest of the commands without having to write it manually. Now, whenever I am loading a new mat file I am changing the name of the variable 6 times in the program.

%first change
load LRWW.mat 
%second change
for i=2002:-1:1141
LRWW(i)=[]; 
end
%third change
for i=1:140
LRWW(1)=[]; end
%fourth change

for i=2:51
LRWW(i)=[]; 
end

%fifth change
matname = ['D:\MATLAB\\LRWW.mat']; 
%sixth change
save(matname,'LRWW');

I hope now my question makes more sense. I am sorry I wasn't clear enough the first time.

[Azzi Abdelmalek]

What does that mean?

load LRWW.mat 

LRWW(i)=[];

[Image Analyst]

If the names of your variables that are stored in your old mat file are unknown and change from file to file, then you need to use dynamic fieldnames like Jan shows you.