Test handle validity. 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.

Help for cv.ShapeContextDistanceExtractor/isvalid is inherited from superclass handle