Adding a pathdef.m file, as a string, to the current path

2021 3 5
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Hello,
I have saved a pathdef file ('pathdef_etc.m') which contains the paths that I need for a given project. I simply want to get the string output from this pathdef file, so that I can add it to my current path using 'addpath( path_string )'.
How can I get this pathdef file as a string?
Thank you

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Charles Pace
Charles Pace 2021-3-5
编辑：Charles Pace 2021-3-5
I am looking for something like...
*from the directory containing the pathdef file*
display(pathdef.m),
so that I can type addpath(ans)
Walter Roberson
Walter Roberson 2021-3-5
What is the file format? Did you create it with savepath ?
Are the individual paths separated by colon or by newlines?
Is this for Windows or (not Windows) ?

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Jorg Woehl
Jorg Woehl 2021-3-5

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You probably want to use textscan for this:
fileID = fopen('pathdef_etc.m')
C = textscan(fileID, '%s', 'Delimiter', '\n')
fclose(fileID)
The output is a single cell containing a n-by-1 cell array of character vectors (one per line in the input file). So C{1}{1} contains the first line of your file, C{1}{2} the second, and so on. You could then set up a loop to add each line to the path:
for i=1:size(C{1},1)
addpath(C{1}{i})
end
Hope this helps!

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Charles Pace
Charles Pace 2021-3-5
Hi, thank you for the answer! I will give this a try.
It is just that I think there is a really straightforward answer. I saw it implemented once, I just can't remember how. It was almost as simple as just clicking the pathdef file in the file explorer, then addpath(ans) or something like that.
When I click the pathdef.m file, it opens up a function p=pathdef , which includes the pathdef search results (all the folders in path), and in the header says..
% PATHDEF returns a string that can be used as input to MATLABPATH
% in order to set the path.
Which makes me think it should be simpler, without any parsing or looping.
However, your help/code has gotten me halfway there so thanks alot! This may work fine.
Charles Pace
Charles Pace 2021-3-5
I just figured it out actually. It was really simple. I just needed to find the pathdef file in the explorer, right click -> 'run',
then the path appeared in command window as one really long string.. 'ans = path1, path2, etc .... '
then just addpath(ans).
Thank you for your help though.
Rik
Rik 2021-3-5
That suggests you can use this as well:
addpath(pathdef);

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