MATLAB Functions | Help Desk |
which
Locate functions and files
which fun whichfun
-all whichfile.ext
whichfun1
infun2
whichfun(a,b,c,...)
s = which(...)
which fun
displays the full pathname of the specified function. The function can be an M-file, MEX-file, workspace variable, built-in function, or SIMULINK model. The latter three display a message indicating that they are variable, built in to MATLAB, or are part of SIMULINK. Use which
private
/fun
or which
class/fun
or which
class
/private
/fun
to further qualify the function name for private functions, methods, and private methods (for the class named class
).
which fun
-all
displays the paths to all functions with the name fun
. The first one in the list is the one normally returned by which
. The others are either shadowed or can be executed in special circumstances. The -all
flag can be used with all forms of which
.
which file.ext
displays the full pathname of the specified file.
which fun1
in fun2
displays the pathname to function fun1
in the context of the M-file fun2
. While debugging fun2
, which
fun1
does the same thing. You can use this to determine if a local or private version of a function is being called instead of a function on the path.
which fun(a,b,c,...)
displays the path to the specified function with the given input arguments. For example, which feval(g)
, when g=inline(`sin(x)')
, indicates that inline/feval.m
is invoked.
s = which(...)
returns the results of which
in the string s
instead of printing it to the screen. s
will be the string built-in
or variable
for built-in functions or variables in the workspace. You must use the functional form of which
when there is an output argument.
For example,
which invreveals that
inv
is a built-in function, and
which pinvindicates that
pinv
is in the matfun
directory of the MATLAB Toolbox.
The statement
which jacobianprobably says
jacobian not foundbecause there is no file
jacobian
.m
on MATLAB's search path. Contrast this with lookfor
jacobian
, which takes longer to run, but finds several matches to the keyword jacobian
in its search through all the help entries. (If jacobian.m
does exist in the current directory, or in some private directory that has been added to MATLAB's search path, which
jacobian
finds it.)
dir
, exist
, help
, lookfor
, path
, what
, who