isposdef

Determine whether (symmetric) matrix is positive-definite

Syntax

   pd = isposdef(A)

Arguments

input

   A          a symmetric matrix

output

   pd         logical true if A is positive-definite

Description

Returns true if A is positive-definite. Uses the Matlab chol function, and like that function the lower triangle of A is assumed to be the (complex conjugate) transpose of the upper triangle; i.e. this routine does not check for symmetry!

See also

chol