# which

## Purpose

Locate functions and files.

## Synopsis

    which funname

## Description

`which` `funname` displays the full pathname of the specified function. The function can be an M-file, MEX-file, built-in function, or SIMULINK graphical function. Built-in functions and SIMULINK graphical functions display a message indicating that they are built in to MATLAB or are part of SIMULINK.

## Examples

For example,

    which inv

reveals that `inv` is a built-in function, and

    which pinv

indicates that `pinv` is in the `matfun` directory of the MATLAB toolbox.

The statement

    which inverse

probably says

    inverse not found

because there is no file `inverse`.`m` on MATLAB's search path. Contrast this with `lookfor` `inverse`, which takes longer to run, but finds several matches to the keyword `inverse` in its search through all the help entries. (If `inverse.m` does exist in the current directory, or in some private directory that has been added to MATLAB's search path, `which` `inverse` finds it.)

## See Also

    dir, exist, help, lookfor, path, what, who

(c) Copyright 1994 by The MathWorks, Inc.