Computes a matrix norm of x using Lapack. The norm can be
the one norm, the infinity norm, the Frobenius norm, or the maximum
modulus among elements of a matrix, as determined by the value of
type.
Usage
norm(x, type, ...)
Arguments
x
a real or complex matrix.
type
A character indicating the type of norm desired.
"O" or "o" or "1" specifies the one norm,
(maximum absolute column sum);
"I" or "i" specifies the infinity norm (maximum
abso
...
further arguments passed to or from other methods.
Value
A numeric value of class "norm", representing the quantity
chosen according to type.
Details
Based on the Lapack functions dlange, dlansy, dlantr,
zlange, zlansy, and zlantr.
References
Anderson, E., et al. (1994).
LAPACK User's Guide,
2nd edition, SIAM, Philadelphia.