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Saving mat file with prefix over loop

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Hello,
Looking help in saving same .mat file with prefix over loop.
Facing error with following script:
clear all
close all
d = uigetdir();
filePattern = fullfile(d, '*.mat');
file = dir(filePattern);
for k = 1: numel(file)
baseFileName = file(k).name;
fullFileName = fullfile(d, baseFileName);
% my code here
outputBaseFileName = sprintf('Edited_%s', baseFileName);
outputFullFileName = fullfile(file(k).folder, outputBaseFileName);
save(outputFullFileName,'Variable_1','-append');
end
Error I am getting is:
Error using save
Unable to write file 'myPath\Edited_myFileName.mat'
No such file or directory.
Error in Untitled (line 29)
save(outputFullFileName,'Variable_1','-append');
  6 Comments
adi kul
adi kul on 4 Dec 2019
Thing is if I use fullFileName instead of outputFullFilename it indeed saves same file with added variable.
% outputBaseFileName = sprintf('Edited_%s', baseFileName);
% outputFullFileName = fullfile(file(k).folder, outputBaseFileName);
save(fullFileName,'Variable_1','-append');
I am not sure what's wrong in here. Here is the full code here:
clear all
close all
d = uigetdir();
filePattern = fullfile(d, '*.mat');
file = dir(filePattern);
for k = 1: numel(file)
baseFileName = file(k).name;
fullFileName = fullfile(d, baseFileName);
x=load(fullFileName)
Variable_1=x.Variable_4./x.Varibale_5;
outputBaseFileName = sprintf('Edited_%s', baseFileName);
outputFullFileName = fullfile(file(k).folder, outputBaseFileName);
save(outputFullFileName,'Variable_1','-append');
end

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Accepted Answer

Walter Roberson
Walter Roberson on 4 Dec 2019
clear all
close all
d = uigetdir();
filePattern = fullfile(d, '*.mat');
file = dir(filePattern);
for k = 1: numel(file)
baseFileName = file(k).name;
fullFileName = fullfile(d, baseFileName);
x=load(fullFileName)
x.Variable_1 = x.Variable_4./x.Varibale_5;
outputBaseFileName = sprintf('Edited_%s', baseFileName);
outputFullFileName = fullfile(file(k).folder, outputBaseFileName);
save(outputFullFileName, '-struct', 'x');
end

More Answers (1)

Ruger28
Ruger28 on 3 Dec 2019
Edited: Ruger28 on 3 Dec 2019
Your Edited .mat file does not exist, so you must create it. Check to see if it exists, if it does, append. If it does not, create it.
clear all
close all
d = uigetdir();
filePattern = fullfile(d, '*.mat');
file = dir(filePattern);
for k = 1: numel(file)
% my code here
outputFullFileName = fullfile(file(k).folder,sprintf('Edited_%s', file(k).name));
if exist(outputFullFileName,'file') % file exists
save(outputFullFileName,'Variable_1','-append');
else % file is new since you made it "edited", and needs created
save(outputFullFileName,'Variable_1');
end
end
  1 Comment
adi kul
adi kul on 4 Dec 2019
this creates Edited_ .mat file but with only Variable_1 in it. While I want to have all the other variables from oriniglal .mat file and apend with Variable_1

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