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Add dgetrf and tests

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removed unnecessary requirement

Implement Dlaswp in both directions

Responded to PR comments
This commit is contained in:
btracey
2015-08-01 17:36:29 -06:00
parent 846e349ee4
commit a0a68a3b68
10 changed files with 293 additions and 90 deletions
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5
native/dgeqrf.go
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@@ -9,7 +9,7 @@ import (
"github.com/gonum/lapack"
)
// Dgeqrf computes the QR factorization of the m×n matrix a using a blocked
// Dgeqrf computes the QR factorization of the m×n matrix A using a blocked
// algorithm. Please see the documentation for Dgeqr2 for a description of the
// parameters at entry and exit.
//
@@ -21,9 +21,6 @@ import (
//
// tau must be at least len min(m,n), and this function will panic otherwise.
func (impl Implementation) Dgeqrf(m, n int, a []float64, lda int, tau, work []float64, lwork int) {
// TODO(btracey): This algorithm is oriented for column-major storage.
// Consider modifying the algorithm to better suit row-major storage.
// nb is the optimal blocksize, i.e. the number of columns transformed at a time.
nb := impl.Ilaenv(1, "DGEQRF", " ", m, n, -1, -1)
lworkopt := n * max(nb, 1)