This question already has an answer here:
How to Set Path in Matlab?
(1 answer)
Closed 7 years ago.
I have created my own mfile and would like to add it permanently lie built in functions so that I dont have to specify path. Is there a way to do it?
You should store your .m file (either script or function) in a folder belonging to the MatLab search path.
To add your own folder to the MatLab search path you can use eiterh:
the Set Path tool, available on the MatLab Home toolbar
use the buil-in function path (from the Command Window or, for example, as part of a script)
E. g.
path(path,'c:\my_folder\my_sub_folder')
Hope this helps.
Write your file and save it and then add the containing folder to the MATLAB search path. You do not need to look for it every time.
addpath('c:/matlab/myfiles')
Note: your filename should not exist within MATLAB, otherwise your file would be the default one, when you call that command.
You can also do most of the work from command-line:
First, create a folder,
mkdir('c:/matlab/myfiles')
Add it to the top of your search path,
addpath('c:/matlab/myfiles')
and then save the search path for future MATLAB sessions
savepath c:/matlab/myfiles/pathdef.m
Related
Where can i save my document "function.m", so i can call this function from any code in any path of my pc?
I already made some custom functions, but i dont know where to save those codes to be able to call them from any part.
Save them in a logical place where you can find them back. Then, use addpath to add that folder to MATLAB's search path, i.e. when you use a function it will try that folder as well to find it.
You can do this either per script, or edit startup.m with this, so that it's automatically included when MATLAB starts.
Alternatively to Adriaan's best practice answer, the fastest option is to save your function.m in the %USERPROFILE%/Documents/MATLAB directory on your PC ($home/Documents/MATLAB on Linux and Mac). This directory is on your MATLAB Search Path by default. This might be an acceptable solution if you use the function commonly across different projects.
Finally, there is a "manual" solution: Execute pathtool in MATLAB, add the directory containing your function.m via the GUI and hit save.
This question already has answers here:
Find location of current m-file in MATLAB
(4 answers)
Closed 6 years ago.
How can I tell / export / copy the current M file being run to a directory.
I know about the copy command I'm just not sure how to get the current M file that is being run.
The reason for this is that I try out the same M files with different edits that create various output files. And I would like to keep the M file changes with the exported files it creates together.
Thanks
PS: I'm using octave 3.8.1 which is like matlab
Use mfilename
p = mfilename('fullpath')
The fullpath option returns the complete path, which directly allows you to use it with the copy command.
Daniel's solution answers your immediate question, but perhaps there is a better way to organize your workflow.
Maybe in addition to creating the output files, you can export a "parameters" file alongside the outputs which describe all parameters needed to recreate the experiment. This can be as simple as calling save to create a MAT-file containing necessary variables... Just an idea :)
My suggestion is to write a script in whatever shell you have available to invoke octave with your M-file where you also copy your M-file and output.
https://www.gnu.org/software/octave/doc/interpreter/Command-Line-Options.html
Thanks Daniel
This code may help someone else that needs to do this
currentfile=strcat(mfilename('fullpath'),'.m') %current file being run with path
[pathstr,name,ext] = fileparts(currentfile) % split into parts
currentfilecpyto=strcat('/tmp/A_',name,ext) %where to copy file to
copyfile(currentfile, currentfilecpyto) %copy file
My team is trying to standardise our Matlab paths so that everyone has the same.
I have a list of the default matlab path that we should all have.
So we would like to have a script that runs when matlab opens to make sure that our paths are set to the default matlab path. So if a path has been added to our default list it will be added in the correct place.
Is this possible in Matlab?
I read about startup but that seems to do with set your working directory which is different to what I am trying to do.
You can change which directory MATLAB starts in using the userpath function so that whenever you start up MATLAB, the path will automatically redirect here.
This may be useful if you have MATLAB running on a network per se, and multiple instances can start in the same network directory.
See more from MathWorks here: http://www.mathworks.com/help/matlab/matlab_env/matlab-startup-folder.html
However, if you want to standardize everything so that everyone has access to the same path, you can use startup to add directories / folders to MATLAB's path, but if you want to complete the package, use userpath to get MATLAB to start at a specified directory.
Your startup.m file may look something like this:
addpath('/folder/to/add/one');
addpath('/folder/to/add/two');
addpath('/folder/to/add/three');
addpath('/folder/to/add/four');
Then set your userpath with the function to complete everything:
userpath('/folder/to/start');
addpath('/folder/to/start');
Also make sure you add this new folder to your startup.m file too.
Include a path or addpath line in file startup.m. For example, to add folder aaa\bbb to the path the line would be
addpath('aaa\bbb')
Note that each user may have a different startup.m file. You may need to create it, if it doesn't already exist.
This question already has answers here:
Access m-files in a subfolder without permanently adding it to the path
(2 answers)
Closed 7 years ago.
I'm working on a project containing some subprojects. Each subproject is located in a own folder.
projDir/subProj1
/subProj2
and so on. Each subproject is a standalone running project. But now I want to use some functions of i.e. subProj1 in subProj2. But the functions in subProj1 should not be visible in general. So it is no good idea, to add the subProj1-path to the MATLAB-Path generally. Hence, I want to add this path in my .m-file stored in subProj2 and after finishing this script, the path should be removed (automatically) by it's own. Is there any possibility, to add a path temporarily to the MATLAB-path variable?
The addpath function only adds the files/folder to your path for the current Matlab session, assuming you don't call savepath. You also might find the genpath function helpful if you want to add subfolders.
You can use path(path_to_add,path) to add a path to the current path variable. Unless you do savepath you won't affect the global path.
I would do path(strcat(pwd,'\subProj1',path) etc. in the config .m script you have.
I have created a few general function in MATLAB that I intend to use for a few separate projects. However I do not want to copy the function into each separate project function.
I have created a folder called Misc_Function when I have placed these general functions. I know I can reference this functions explicitly by using the path and function name when trying to call the functions.
I believe you can add a path (in my case 'H:\MyTeam\Matlab\Misc_Function') when MATLAB loads up is that correct and if so how do you do this?
Assuming the above can be done I'm interested to know how MATLAB finds the correct function. In my understanding (guess work) MATLAB has a list of paths that it check trying to find a function with the name specified - is that correct? If so what happens when there are functions with the same name?
MATLAB indeed has its own search path which is a collection of folders that MATLAB will search when you reference a function or class (and a few other things). To see the search path, type path at the MATLAB prompt. From the documentation:
The order of folders on the search path is important. When files with the same name appear in multiple folders on the search path, MATLAB uses the one found in the folder nearest to the top of the search path.
If you have a set of utility functions that you want to make available to your projects, add the folder to the top of the search path with the addpath function, like so
addpath('H:\MyTeam\Matlab\Misc_Function');
You have to do this everytime you start MATLAB. Alternatively, and more conveniently, save the current search path with the savepath command or add the above commands to your startup.m file.
You can check the actual paths where Matlab searches for functions using
path
You will notice, that the most top path (on start up) is a path in your home folder. For Linux this is e.g. /home/$USER/Documents/MATLAB. For Windows it is somewhere in the the c:\Users\%USER%\Documents\Matlab (I think). Placing a file startup.m in this folder allows to add additional paths using
addpath('H:\MyTeam\Matlab\Misc_Function');
or
addpath(genpath('H:\MyTeam\Matlab\Misc_Function'));
on start up of Matlab. The latter (genpath) allows to also add all subdirectories. Simply write a file startup.m and add one of above lines there.
I believe 'addpath' will add the folder to MATLAB path only for the current MATLAB session. To save the updated path for other sessions, you need to execute 'savepath' command.
As mentioned in the previous comments, adding the folder in startup.m is a good idea since it will be added to the path on MATLAB startup.
To answer your question about how MATLAB finds the correct function, MATLAB maintains a list of directories in its path in a file called pathdef.m. Any changes to the path will be written to this file (when you execute 'savepath'). The path variable is initialized with the contents of this file.