Do MATLAB functions know which directory they are defined in? [duplicate]

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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

开发者_StackOverflowHow can I write such a function?

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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.

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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')))