1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
|
// Copyright ©2016 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 (
"testing"
"golang.org/x/exp/rand"
"gonum.org/v1/gonum/blas/blas64"
)
type Dorg2ler interface {
Dorg2l(m, n, k int, a []float64, lda int, tau, work []float64)
Dgeql2er
}
func Dorg2lTest(t *testing.T, impl Dorg2ler) {
const tol = 1e-14
rnd := rand.New(rand.NewSource(1))
for _, test := range []struct {
m, n, k, lda int
}{
{5, 4, 3, 0},
{5, 4, 4, 0},
{3, 3, 2, 0},
{5, 5, 5, 0},
{5, 4, 3, 11},
{5, 4, 4, 11},
{3, 3, 2, 11},
{5, 5, 5, 11},
} {
m := test.m
n := test.n
k := test.k
lda := test.lda
if lda == 0 {
lda = n
}
a := make([]float64, m*lda)
for i := range a {
a[i] = rnd.NormFloat64()
}
tau := nanSlice(max(m, n))
work := make([]float64, n)
impl.Dgeql2(m, n, a, lda, tau, work)
impl.Dorg2l(m, n, k, a, lda, tau[n-k:], work)
q := blas64.General{Rows: m, Cols: n, Data: a, Stride: lda}
if resid := residualOrthogonal(q, false); resid > tol {
t.Errorf("Case m=%v, n=%v, k=%v, lda=%v: columns of Q not orthonormal; resid=%v, want<=%v", m, n, k, lda, resid, tol)
}
}
}
|
