mirror of
https://github.com/gonum/gonum.git
synced 2025-10-04 23:02:42 +08:00
96 lines
2.0 KiB
Go
96 lines
2.0 KiB
Go
// Copyright ©2015 The Gonum Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package testlapack
|
|
|
|
import (
|
|
"math/rand"
|
|
"testing"
|
|
|
|
"gonum.org/v1/gonum/floats"
|
|
)
|
|
|
|
type Dgeqrfer interface {
|
|
Dgeqr2er
|
|
Dgeqrf(m, n int, a []float64, lda int, tau, work []float64, lwork int)
|
|
}
|
|
|
|
func DgeqrfTest(t *testing.T, impl Dgeqrfer) {
|
|
rnd := rand.New(rand.NewSource(1))
|
|
for c, test := range []struct {
|
|
m, n, lda int
|
|
}{
|
|
{10, 5, 0},
|
|
{5, 10, 0},
|
|
{10, 10, 0},
|
|
{300, 5, 0},
|
|
{3, 500, 0},
|
|
{200, 200, 0},
|
|
{300, 200, 0},
|
|
{204, 300, 0},
|
|
{1, 3000, 0},
|
|
{3000, 1, 0},
|
|
{10, 5, 20},
|
|
{5, 10, 20},
|
|
{10, 10, 20},
|
|
{300, 5, 400},
|
|
{3, 500, 600},
|
|
{200, 200, 300},
|
|
{300, 200, 300},
|
|
{204, 300, 400},
|
|
{1, 3000, 4000},
|
|
{3000, 1, 4000},
|
|
} {
|
|
m := test.m
|
|
n := test.n
|
|
lda := test.lda
|
|
if lda == 0 {
|
|
lda = test.n
|
|
}
|
|
a := make([]float64, m*lda)
|
|
for i := 0; i < m; i++ {
|
|
for j := 0; j < n; j++ {
|
|
a[i*lda+j] = rnd.Float64()
|
|
}
|
|
}
|
|
tau := make([]float64, n)
|
|
for i := 0; i < n; i++ {
|
|
tau[i] = rnd.Float64()
|
|
}
|
|
aCopy := make([]float64, len(a))
|
|
copy(aCopy, a)
|
|
ans := make([]float64, len(a))
|
|
copy(ans, a)
|
|
work := make([]float64, n)
|
|
// Compute unblocked QR.
|
|
impl.Dgeqr2(m, n, ans, lda, tau, work)
|
|
// Compute blocked QR with small work.
|
|
impl.Dgeqrf(m, n, a, lda, tau, work, len(work))
|
|
if !floats.EqualApprox(ans, a, 1e-12) {
|
|
t.Errorf("Case %v, mismatch small work.", c)
|
|
}
|
|
// Try the full length of work.
|
|
impl.Dgeqrf(m, n, a, lda, tau, work, -1)
|
|
lwork := int(work[0])
|
|
work = make([]float64, lwork)
|
|
copy(a, aCopy)
|
|
impl.Dgeqrf(m, n, a, lda, tau, work, lwork)
|
|
if !floats.EqualApprox(ans, a, 1e-12) {
|
|
t.Errorf("Case %v, mismatch large work.", c)
|
|
}
|
|
|
|
// Try a slightly smaller version of work to test blocking.
|
|
if len(work) <= n {
|
|
continue
|
|
}
|
|
work = work[1:]
|
|
lwork--
|
|
copy(a, aCopy)
|
|
impl.Dgeqrf(m, n, a, lda, tau, work, lwork)
|
|
if !floats.EqualApprox(ans, a, 1e-12) {
|
|
t.Errorf("Case %v, mismatch large work.", c)
|
|
}
|
|
}
|
|
}
|