MATLAB Function Reference | Search  Help Desk |
exist | Examples See Also |
Check if a variable or file exists
a = exist('item
') ident = exist('item
',kind
)
a = exist('item
')
returns the status of the variable or file item
: exist('
item
')
or exist('
item.ext
')
returns 2
if item
is on the MATLAB search path but the filename extension (ext
) is not mdl
, p,
or mex
. item
may be a MATLABPATH
relative partial pathname.
ident = exist('item
','kind')
returns logical true (1
) if an item of the specified kind
is found, and returns 0
otherwise. kind
may be:
|
Checks only for variables. |
|
Checks only for built-in functions. |
|
Checks only for files. |
|
Checks only for directories. |
exist
can check whether a MATLAB function is built-in or a file:
ident = exist('plot') ident = 5
plot
is a built-in function.
dir
Directory listing
help
Online help for MATLAB functions and M-files
lookfor
Keyword search through all help entries
what
Directory listing of M-files, MAT-files, and MEX-files
which
Locate functions and files
who
List directory of variables in memory
See also partialpath.