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4.3 Predicates for Numeric Objects

Function File: is_matrix (a)

Return 1 if a is a matrix. Otherwise, return 0.

Function File: is_vector (a)

Return 1 if a is a vector. Otherwise, return 0.

Function File: is_scalar (a)

Return 1 if a is a scalar. Otherwise, return 0.

Function File: is_square (x)

If x is a square matrix, then return the dimension of x. Otherwise, return 0.

Function File: is_symmetric (x, tol)

If x is symmetric within the tolerance specified by tol, then return the dimension of x. Otherwise, return 0. If tol is omitted, use a tolerance equal to the machine precision.