Indicates there is a Java class Welcome and a Java class file Welcome.class.

In the following example, exist returns 8 on the Java class, Welcome, and returns 2 on the Java class file, Welcome.class. This indicates that plot is a built-in function. This example uses exist to check whether a MATLAB function is a built-in function or a file: It is similar to the colon operator ':', but gives direct control over the number of points. The linspace function generates linearly spaced vectors. To check for the existence of more than one variable, use the ismember function. y linspace(a,b) y linspace(a,b,n) Description. Returns the status of the variable or file in variable a. The kind argument may be one of the following: If item of type kind does not exist, it returns 0. Returns the status of item for the specified kind.

However, if item is a Java class file, then exist('item') returns a 2. If item is a Java class, then exist('item') returns an 8. If the file or directory is not on the search path, then item must specify either a full pathname, a partial pathname relative to MATLABPATH, or a partial pathname relative to your current directory. If item is found, but is not on the MATLAB search path, exist('item') returns 2, because it considers item to be an unknown file type.Īny other file type or directory specified by item is not required to be on the MATLAB search path to be recognized by exist. MEX, MDL, and P-files must be on the MATLAB search path for exist to return the values shown above. If item specifies a filename, that filename may include an extension to preclude conflicting with other similar filenames. If item is a P-file on your MATLAB search path. If item is an MDL-file on your MATLAB search path. If item is a MEX-file on your MATLAB search path. If item is an M-file or a file of unknown type. If the variable item exists in the workspace. Returns the status of the variable or file, item:

Exist (MATLAB Functions) MATLAB Function ReferenceĪs an alternative to the exist function, use the Workspace browser or the Current Directory Browser.

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