MATLAB: Saving pictures with right names

MATLABMATLAB and Simulink Student Suite

Hello everyone,

i try to move a certain number of pictures from one folder to another one.

I am using this Code, but cannot figure out how to declare the name correctly.

myFolder = 'C:\Users\jungh\Desktop\Studienarbeit\200526_calibrationGalvo\Pictures\testdurchlauf110620(funktioniert)'; %Ordner festlegen, wo Bilder liegen
filePattern = fullfile(myFolder, '*.png'); % Change to whatever pattern you need.
theFiles = dir(filePattern);
for k = length(theFiles):-1 : 1
    baseFileName = theFiles(k).name;
    fullFileName = fullfile(theFiles(k).folder, baseFileName);
    fprintf(1, 'Now reading %s\n', fullFileName);
    imwrite(baseFileName, ['C:\Users\jungh\Desktop\Studienarbeit\200526_calibrationGalvo\Pictures\testdurchlauf110620(funktioniert)\PicturesDiagram\%s.png', baseFileName]);
end

Hope someone can help me:)

Have a great day,

Lucas:)

Best Answer

imwrite required that you load the image. Here you just want to move the files using their filename. Use movefile() function. Something like this will work

myFolder = 'C:\Users\jungh\Desktop\Studienarbeit\200526_calibrationGalvo\Pictures\testdurchlauf110620(funktioniert)'; %Ordner festlegen, wo Bilder liegen
destFolder = 'C:\Users\jungh\Desktop\Studienarbeit\200526_calibrationGalvo\Pictures\testdurchlauf110620(funktioniert)\PicturesDiagram\';
filePattern = fullfile(myFolder, '*.png'); % Change to whatever pattern you need.
theFiles = dir(filePattern);
for k = length(theFiles):-1 : 1
    baseFileName = theFiles(k).name;
    sourceFileName = fullfile(theFiles(k).folder, baseFileName);
    fprintf(1, 'Now reading %s\n', sourceFileName);
    destFileName = fullfile(destFolder, baseFileName);
    imwrite(sourceFileName, destFileName);
end

Related Solutions

MATLAB: Reading files and writing with new extension

Use fileparts, something like this:

[~,fnm] = fileparts(jpgFiles{i});
fullfile(myFolder, sprintf('%s.txt',fnm))

MATLAB: How to decide the next problem

Elina - the error message is telling you that you are not providing enough output variables given the input fields. Looking at strread, [A, B, ...] = strread('str', 'format') reads data from str into variables A, B, and so on using the specified format. The number of output variables A, B, etc. must be equal to the number of format specifiers (e.g., %s or %d) in the format argument. Since you are providing seven format specifiers, then you must have seven output variables. And I think that you know this based on your code where you have the inner loop iterate from 1 to 7. But this won't work the way you have intended because you are only using one output variable, FilesNames(i,j) at each iteration. You might have more success if you were to declare FilesNames as a cell array

 FilesNames=cell(length(fileList),7);
 for k=1:length(fileList)
     [FilesNames{k,:}]=strread(fileList{k,1}, '%s %s %s %s %s %s %s', 'delimiter', '\\');
 end

Note how I've removed the quotes around the first input to strread. If we leave the quotes, then each iteration will pass the same string of 'fileList{k,1}', rather than the file name accessed at fileList{k,1}.

The above may work provided that a file is no more than six folders deep from the root directory. (If seven or more, then the cell arrays in stored in FilesNames double up. Check the following example

 % file is six folders deep from Users 
 fileName = '/Users/geoff/Development/bitbucket_repos/matlab/testing/2014-09-30_110331.mat';
 [FilesNames{1,:}]=strread(fileName, '%s %s %s %s %s %s %s', 'delimiter', '/');

then the first element of FilesNames is a 2x1 column vector

 FilesNames{1}
 ans = 
    ''
    '2014-09-30_110331.mat'

Why not try something else? Suppose your file name and path is

 fileAndPath = 'D:\20140210_test\Experiment1\ExpData_1_1.exp';

Then we can use fileparts to get the path, filename, and extension

 [path,filename,ext] = fileparts(fileAndPath);

Now if we are looking for the numeric portion of path that is followed by '_test' then we could use regexp to get us that data

 destFilename = strrep(char(regexp(path,'[0-9]+_test','match')),'_','.');

In the above, we use the expression '[0-9]+_test' to match in path where there is at least one (+) numeric character ([0-9]) that is followed by '_test'. We then replace the underscore with a period using strrep.

We then create the new file name with the file parts that we have already extracted

 destFilename = [destFilename '.' filename ext];

which yields

 destFilename =
     20140210.test.ExpData_1_1.exp

Your code would be something like the following then

 newFilenames=cell(length(fileList),1);
 for k=1:length(fileList)
     fileAndPath         = fileList{k};
     [path,filename,ext] = fileparts(fileAndPath);
     destFilename        = strrep(char(regexp(path,'[0-9]+_test','match')),'_','.');
     newFilenames{k}     = [destFilename '.' filename ext];
 end

Best Answer

Related Solutions

MATLAB: Reading files and writing with new extension

MATLAB: How to decide the next problem

Related Question