norm:

Syntax:	norm( A )
	norm( A , "type" )

Description:

	The first form defaults to computing the 1-norm of the input
	matrix. The second form allows the user to specify the desired
	vector or matrix norm.

	type:

	"M" or "m" returns max(abs( MATRIX ))
	
	"1", "O" or "o" return the 1-norm (default)

	"2" returns the matrix 2-norm (largest singular value)

	"I" or "i" returns the infinity-norm

	"F", "f", "E" or "e" returns the Frobenius norm.

	LAPACK subroutines DLANGE and ZLANGE are used to compute all
	norms, except the 2-norm.
