Do MATLAB functions know which directory they are defined in?

Question

Possible Duplicate:
Find location of current m-file in Matlab

I would like to write an m-file that will display the directory the function is defined in.

For instance if the function foo.m is placed in the directories c:\bar and c:\foo (full path to the file is then either c:\bar\foo.m or c:\foo\foo.m), neither of which is intially on the MATLAB path, this sequence of commands

addpath("c:\bar");
foo

would produce the result: I am located in directory c:\bar

while

addpath("c:\foo");
foo

would produce the result I am located in directory c:\foo

How can I write such a function?

@gnovice I do not think it is a duplicate. The OP is asking about something on the lines of how matlab does function overloading (it uses different paths). — Pavan Yalamanchili, Jul 06 '11 at 17:08
@Pavan: No, he's not. He's adding each function to the path *individually*, not at the same time (which *would* lead to `foo` being an overloaded function). He's specifically asking how a function can know the directory it's in, which is covered by the duplicate question. — gnovice, Jul 06 '11 at 17:13

score 6 · Accepted Answer · answered Jul 06 '11 at 17:05

6

Are you looking for the mfilename function? The optional fullpath input argument returns the full path to the m-file that the function is called from.

answered Jul 06 '11 at 17:05

Praetorian

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score 2 · Answer 2 · answered Jul 06 '11 at 20:55

2

Praetorian is correct. You may also be interested in the fileparts function. Below is code that should do what you are requesting.

function foo
fprintf('I am located in directory %s', fileparts(mfilename('fullpath')))

answered Jul 06 '11 at 20:55

Erik

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Do MATLAB functions know which directory they are defined in?

2 Answers2