how to get matlab to open current folder in finder? I find this useful on network computers.
Also how to get the path of something in the setpath folder I see something like \software ... and I would like to get the complete beginning of the path
To open a new OS X Finder window from Matlab you'll need to execute a Terminal command using unix or system, e.g.:
unix('open ~/Desktop')
will open the current user's Desktop folder. To open Matlab's current directory (see pwd), use the dot command:
unix('open .') % Equivalent to: unix(['open ' pwd])
The ! operator can be used as well as shorthand for system.
Related
I've just created a script file in MATLAB, but can not run it. The name of my script is getEnvFiles.m. When I first tried to run it, I got the following result:
>> getEnvFiles
'getEnvFiles' is not found in the current folder or on the MATLAB path, but exists in:
\\wsl$\ubuntu\home\me
Change the MATLAB current folder or add its folder to the MATLAB path.
So, I added this directory (which is actually the current directory) to the search path, but still got the same result:
>> addpath('\\wsl$\ubuntu\home\me')
>> getEnvFiles
'getEnvFiles' is not found in the current folder or on the MATLAB path, but exists in:
\\wsl$\ubuntu\home\me
Change the MATLAB current folder or add its folder to the MATLAB path.
When I check the path, it looks like this directory is on the path:
>> path
MATLABPATH
\\wsl$\ubuntu\home\me
I can further verify that this directory is my present directory:
>> pwd
ans =
'\\wsl$\ubuntu\home\me'
and that getEnvFiles.m is in this directory:
>> ls
. .emacs.d HarborData
.. .emacs~ RawHarborData
.bash_history .landscape at
.bash_logout .motd_shown getEnvFiles.m
.bashrc .profile test.m
.bashrc~ .sudo_as_admin_successful
.emacs
Is the issue that I'm using wsl (Windows Subsystem for Linux), or do I have some other misunderstanding?
Type rehash and then try running your script again. Even though you have added the new directory to your path, you need to update the path cache so that it knows about the new scripts it can see.
The problem seems to lie in WSL's ability to add new files to the directory. When I create a new script within MATLAB, and try to run it, I get the problem discussed above. However, running already existing files is not a problem. For now, my only solution is to close MATLAB after creating a new script and reopen it. Then, I can run it. Although, oddly, I can't open it in MATLAB's editor.....
This may or may not help, but ...
Sometimes you have to prepend execution with .\ in order to run scripts in PowerShell or from within the command prompt (in Windows, I'm not sure about other operating systems).
I get this error quite often, especially when not in Admin mode.
Does this work?
% Get path of executing script.
filePath = matlab.desktop.editor.getActiveFilename; % Note that this isn't necessarily the same as the output of 'pwd()'.
% Or: filePath = mfilename('fullpath')
% Make sure all nested directories of filePath are on the path, then tell MATLAB where you're working.
addpath( genpath( filePath ) ); % If this fails, try one folder up the tree:
% addpath( genpath( fullfile( filePath, '.' ) );
cd( filePath );
Alternatively, it looks like you might have written and saved the script, and then typed it into the command window to execute. If it's not a special type of script (Function/Class/GUI/etc.) then you can simply click 'Run' in the Editor tab (or the F5 key) and MATLAB should prompt you with a 'Change Folder' option, to which you should acquiesce.
If you're running this script through the WSL terminal, try my suggested code.
I have many folder like data_1,data_2, data_3 etc, that will be generated during program running. I want to copy these folders into .tar file named full_data.tar in a specified folder.
How can I insert folders named data_1,data_2, data_3 etc into full_data.tar in MATLAB by using UNIX commands?
As #kedarps already proposed I would also use the command line. The matlab command to execute command line arguments is:
status = system(command)
It is documented under this link:
system documentation
So if I take the unixcommand from #kedarps this should work:
system('tar -cvf full_tar.tar data_1 data_2 data_3')
I hope this helps
I have a simple script in matlab and I want to load a file. It seems it only works if the file is in the same dir as the script. If I add the file to a directory it does not read it.
For example:
fileID = fopen('myfile','r' ,'n', 'US-ASCII');
but when I put myfile in files:
fileID = fopen('files/myfile','r' ,'n', 'US-ASCII');
or
fileID = fopen('./files/myfile','r' ,'n', 'US-ASCII');
I get a -1 as a fileID. File cannot be read.
As per the comments, this is happening because you most likely added the path of where the script was located to your MATLAB path but you did not add the subdirectory where the file was in to your path. This is why it can't find the file. Therefore to avoid this in the future, you need to physically change the directory (i.e. the Working Directory) of where MATLAB is currently operating to where your script is stored.
It is then where local referencing should work. You can do this by either using the cd function, going to the top of your MATLAB window where you see the directory listing, clicking on the arrow to the right and pulling a drop down menu to change the directory, typing the actual directory you want by clicking on any blank space in the directory listing to enable a text box:
... or if you are running the code in the MATLAB editor, it'll request that you change directories as the script you are trying to run is not currently located in the working directory.
You can also programmatically add the subfolders in your script directory using mfilename, fileparts, genpath and addpath:
[dir, ~, ~] = fileparts(mfilename('fullpath')); % locate your script directory
addpath(genpath(fullfile(dir))); % add the folder and all subfolders to Matlab search directory
% then load your file.
fileID = fopen('myfile','r' ,'n', 'US-ASCII')
If it is also important that all outputs should be placed within the same directory as your script file, you can cd to your script directory:
cd(dir)
I am new to image processing and what I am trying to do is resize an image and store it in tif format, but command window reports an error saying "you don't have the permission to write"
my code is imwrite(B,'myNewFile.tif');
and after running it shows
Error using imwrite (line 10)
Unable to open file "myNewFile.tif" for writing. You may not have write permission.
Do I have to create a file by the name 'myNewFile' before writing the above code?
As the error message states, you are trying to write the file myNewFile.tif to the current working directory. However, you do not have writing permission in the current working direcoty. This is an OS issue, not a Matlab one.
What you can do is change the current working directory (using cd command) and write the image to a different folder where you do have writing permissions.
Alternatively, you can supply a full path to the image file name, directing it to a folder where you have writing permissions.
imwrite( B, fullfile( '/path/to/where/you/can/write', 'myNewFile.tif' ) );
Here are links to the description of some Matlab commands that might help you:
pwd can be used to check what is your current working directory.
You can use cd to change the current working directory.
fullfile helps you construct file names and paths in a generic way without worrying about OS pecularities.
I am using the system command in MATLAB as follows (with the current directory being 'scripts'):
[status, result] = system('cd ..\\TxtInOut')
However, invoking the system command does not seem to work. It returns status = 0 and result = ''.
Any suggestions?
If you want to change directories, you should use the CD command. The argument can be either a full path or relative path:
cd('c:\matlab\toolbox'); %# Full path to a directory
cd('scripts'); %# Move to a subdirectory "scripts"
cd('..\TxtInOut'); %# Move up one level, then to directory "TxtInOut"
If you want information about a directory, you should use the DIR command. DIR will return an m-by-1 structure of information for a directory, where m is the number of files and folders in the directory. Again, the argument can be either a full path or relative path:
data = dir('c:\matlab\toolbox'); %# Data for a full path to a directory
data = dir('scripts'); %# Data for a subdirectory "scripts"
NOTE: When working on different platforms (i.e. Windows or UNIX), you will have to pay attention to whether you use the file separator \ or /. You can get the file separator for your platform using the function FILESEP. You can also build your file paths using the function FULLFILE.
Any command executed by "system" is external to MATLAB. A command shell is generated, executes your request, and then returns the result. The 0 result indicates successful completion: the command shell changed its current directory as requested and then returned. (Command shells use non-zero to indicate an error, because there are usually many more ways that a program can fail than succeed.) Unfortunately that only affects the command shell's current directory - see gnovice's answer for how to actually change the directory.
you can use cd, dir, ls, etc directly in matlab without call system functions.
You can also use the underlying operating system commands by preceding them by an exclamation sign.
For instance:
!dir will show you the current directory contents in Windows
!pwd will show you the current directory in Linux/Mac
But calling cd does not change the current directory!