matrixcalc (version 1.0-6)

frobenius.norm: Compute the Frobenius norm of a matrix

Description

This function returns the Frobenius norm of the matrix \({\mathbf{x}}\).

Usage

frobenius.norm(x)

Value

A numeric value.

Arguments

x

a numeric vector or matrix

Author

Frederick Novomestky fnovomes@poly.edu

Details

The formula used to compute the norm is \(\left\| {\bf{x}} \right\|_2\). Note that this is the entrywise norm with exponent 2.

References

Bellman, R. (1987). Matrix Analysis, Second edition, Classics in Applied Mathematics, Society for Industrial and Applied Mathematics.

Golub, G. H. and C. F. Van Loan (1996). Matrix Computations, Third Edition, The John Hopkins University Press.

Horn, R. A. and C. R. Johnson (1985). Matrix Analysis, Cambridge University Press.

See Also

entrywise.norm

Examples

Run this code
A <- matrix( c( 3, 5, 7, 2, 6, 4, 0, 2, 8 ), nrow=3, ncol=3, byrow=TRUE )
print( frobenius.norm( A ) )

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