MATLAB: File manipulation

multiple files

Dear Matlabians

I have done a script that takes csv and txt files manipulates them and produces a final xls with the data in those files. Each time i take on specific file and then I continue to the next one.

But sometimes there is some files that the data in there are wrong. In my script I have found a way to check this and I know which files will be wrong. And I have made the script to stop at those points

The question is: Is there a way during the script is stop to open the file which is wrong to maniputale it by hand (delete the data that are wrong) then save the file again and make the script to restart for this file and continue as it suppose to continue

Thank you

Best Answer

Yes. Use try-catch and keyboard() to control the program flow.

try
  ProcessFileForTheFirstTime();
catch
  keyboard;
  % Outside MATLAB, OpenTheProblematicFile();
  % Outside MATLAB, ManualEditAndSaveFile();
  ProcessFileForTheSecondTime();
end

The keyboard() function can be used to pause your program till you type return.

Related Solutions

MATLAB: How to go to the next iteration when one fails

You crate a list of existing files by the DIR command already. So there is no reasons not to use it:

folder = 'C:\Temp\';  % Adjust
files = dir(fullfile(Folder, '*.txt']);
for i = 1:length(files)
   aFile = fullfile(Folder, files(i).name);
   try
     load(aFile);
   catch
     warning('Cannot find file %s', aFile);
    end
end

You code contains several other problems:

Increasing the loop counter i inside the loop does not work in Matlab.
The continue is not required, because the loop is resumed without it also.
Better check the source of the problem instead of catching a failing command:

A cleaner version:

for i = 1:length(files)
  if exist(['data' num2str(i) '.txt'], 'file')
    try
      load (['data' num2str(i) '.txt']);
    catch
      % Nothing to do actually!
    end
  end
end

But if one file is missing, the loop will still stop at length(files). Then less than length(files) are imported. Se my above suggestion for a better solution.

Notice that loading MAT files directly into the workspace can lead to unexpected behavior and slows down Matlab. Better store the output in a variable.

MATLAB: Terminate program once input is required using system()

Hi,

maybe use piping and pipe in a txt file with one empty line. So create a new txt file which contains one line (simply press enter once in the txt file) and save it in some folder with some name. Then when you call your Trnexe.exe pipe in that file by using:

Trnrun = ['Trnexe.exe ',Deckpath,Deckname, '<C:\some_folder\some_file.txt'];
system(Trnrun)

So when the application wants in input it doesn't use STDIN it uses one line of the txt file. This basically simulates the enter press. Let me know if that works for you.

Best Answer

Related Solutions

MATLAB: How to go to the next iteration when one fails

MATLAB: Terminate program once input is required using system()

Related Question