Description Usage Arguments Details Value References Examples
Computes a matrix norm of x
, using MAGMA for GPUs or PLASMA
for multi-core CPUs.
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
. Not all norms are supported by MAGMA or PLASMA and
these are documented below.
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x |
a real matrix. |
type |
A character indicating the type of norm desired. All these norms are supported in the latest PLASMA library (v2.4.6 asof writing).
The default is |
... |
further arguments passed to or from other methods. |
When or if the GPU is used magmablas_dlange
for dgeMatrix
is called
or magmablas_dlansy
is used for symmetric dsyMatrix
or dpoMatrix
.
When the multi-core library PLASMA is used PLASMA_dlange
and PLASMA_dlansy
are used for the respective matrix types mentioned previously.
A numeric value of class "norm"
, representing the quantity
chosen according to type
.
Martin Maechler, Douglas Bates (Matrix package)
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