swpref.isvalid method

TF = ISVALID(H) performs an element-wise check for validity on the handle elements of H. The result is a logical array of the same dimensions as H, where each element is the element-wise validity result.

A handle is invalid if it has been deleted or if it is an element
of a handle array and has not yet been initialized.

See also SWPREF, SWPREF/DELETE

Help for swpref/isvalid is inherited from superclass HANDLE Reference page in Doc Center doc swpref/isvalid