I have a short question regarding the copyfile function within MATLAB. Basically I want to copy a file from a different user selected directory/file to the current directory (where the function is run from). I am struggling with how to do this.
So far I have:
[jxlfilename,jxlfilepath] = uigetfile({'*.jxl'}, 'Pick a File');
copyfile(????)
I have read the help that MATLAB offers, but I just can't seem to figure it out.
The syntax for copyfile is
copyfile(source,destination);
The function to concatenate paths and filenames is fullfile .
The current directory is selected with .
Together this gives you
[jxlfilename,jxlfilepath] = uigetfile({'*.jxl'}, 'Pick a File');
copyfile(fullfile(jxlfilepath,jxlfilename),'.');
you were almost there, once your selected your file do:
copyfile(strcat(jxlfilepath,jxlfilename))
and if you don't specify a second argument copyfile will copy the file to the current folder and the strcat(jxlfilepath,jxlfilename) will construct the string with path and filename.
Or
copyfile(strcat(jxlfilepath,jxlfilename),'newname.jxl')
if you want to assign a new name to the file.
Related
Is it possible to list all of the files in a directory of a certain file type, and then save them in the same directory but as a separate file type using MatLab?
In my case, I have 144 files saved as in a .fig format, but I would like to copy them as a .tif format so that I don't have to go and change each file manually.
I know I can list all the files in my directory using the dir function and I guess I could simply run for loop with i=1:length(dir) but I don't know how to isolate the files of a specific file type. I don't see filetype as a field name on the mathworks website for dir.
Thanks for any suggestions.
To list only files of type .fig:
files = dir('*.fig');
You can then loop over the names:
for k = 1:numel(files)
filename = files(k).name;
% do something with filename
end
I'm new to matlab and I've wrote a code that implements the gamma function for image processing. I generate around 300 photos named '001.jpg' to '300.jpg' and then use ffmpeg to make a video.
In the end, I only need the video result and need a command to delete all the photos generated in the directory! is there a way to do that?
If you want to remove all .jpg files in the current directory you can use the delete command with a wildcard (*)
delete('*.jpg')
If the files live in a folder other than the current directory, you can specify the directory in this way.
folder = '/path/to/my/files';
delete(fullfile(folder, '*.jpg'))
If you want to limit it to just files that have number filenames, you could do something like the following
files = dir('*.jpg');
filenames = regexp({files.name}, '^[0-9]+\.jpg$', 'match', 'once');
filenames = cellstr(cat(1, filenames{:}));
delete(filenames{:})
Adding to Suever's answer (not allowed to comment yet):
Assuming you already know the names of the images you're creating, you could save your script a 'trip' to the folder and back by creating the filenames list yourself thus:
for i=1:numOfImages
filenames(i)={strcat(num2str(i),'.jpg')};
end
delete(filenames{:})
I want to save a matrix (e.g. "PTX_Data_Raw.mat") in another folder (e.g. Temp folder). I have written below code:
mkdir('D:\Projects\ProgrammingPart\Method2_FinalApproved\8-congruent','Temp');
filename=('D:\Projects\ProgrammingPart\Method2_FinalApproved\8-congruent\Temp');
save(filename,'PTX_Data_Raw.mat');
but it didn't work. Does anybody can help me for solving this problem?
THX
Going with your comments, you are using save wrong. The first parameter is the filename you want to call the MAT file and second parameter and onwards are the variables you want to save.
Therefore, you need to make sure filename contains the entire filename, including the path followed by the actual name of the MAT file you want. After, the second parameter is PTX_Data - the name of the matrix you want to save.
mkdir('D:\Projects\ProgrammingPart\Method2_FinalApproved\8-congruent','Temp');
%// Change
filename=('D:\Projects\ProgrammingPart\Method2_FinalApproved\8-congruent\Temp\PTX_Data_Raw.mat');
save(filename,'PTX_Data'); %// Change
I have a program that reads data from .trc files. But as of now, it can only read the .trc files that are in the current directory i.e the MATLAB folder. If I want it to read a file, I have to copy the file in MATLAB folder. Is there a way I can move to different directories and choose another .trc file? I have tried using dir, uigetdir etc. but nothing seems to work!
It's pretty straightforward to filter results with the dir command with a file extension if you specify the folder to search with a wildcard character in place of the file name. You can then loop over the generated list of file names in the output structure (as shown) or whatever you need to do with those files.
folderName = 'C:\Path\To\Target\Folder\';
fileList = dir(strcat(folderName, '*.trc'));
for k = 1:length(fileList)
fileHere = fullfile(folderName, fileList(k).name);
% Do what you need with the files in here
end
i'm trying to load a mat file from a subdirectory using the following code:
% filename_str is read from a text file
directoryname_str = "./data";
f = fullfile(directoryname_str, filename_str);
load(f);
when i run this sequence, load says it can't find the file...but when i copy or type the relative path and the file name by hand into an active octave session, everything works like a champ with no errors.
i assume this has something to do with how octave searches for mat files? if so, what's the correct environment variable or function call i need to make in order for this code to work?
thanks!
Are you sure that what you put into the variable f is the same as what you input manually in octave?
Are you also in the same directory? Because you're specifying relative paths, this should be the case.. you can get the current directory octave is in with pwd
And last of all, you can double check file existence in octave itself using exist
exist(f,'file')
If this returns false, there's definitely something wrong with your current directory, are something's very weird going on..