issparse

Test whether the input is a sparse matrix.

Syntax

tf = issparse(S)

Description

Returns logical true when S is stored in sparse format, false otherwise. Useful for branching on representation when a function should specialize differently for sparse vs. full inputs.

Examples

issparse(speye(5))       % 1
issparse(eye(5))         % 0

See also

• sparse — Create a sparse matrix.
• full — Convert a sparse matrix to full storage.