+++ /dev/null
-// 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 (
- "fmt"
- "testing"
-
- "golang.org/x/exp/rand"
-
- "gonum.org/v1/gonum/floats"
-)
-
-type Dorg2rer interface {
- Dgeqrfer
- Dorg2r(m, n, k int, a []float64, lda int, tau []float64, work []float64)
-}
-
-func Dorg2rTest(t *testing.T, impl Dorg2rer) {
- rnd := rand.New(rand.NewSource(1))
- for _, test := range []struct {
- m, n, k, lda int
- }{
- {3, 3, 0, 0},
- {4, 3, 0, 0},
- {3, 3, 2, 0},
- {4, 3, 2, 0},
-
- {5, 5, 0, 20},
- {5, 5, 3, 20},
- {10, 5, 0, 20},
- {10, 5, 2, 20},
- } {
- m := test.m
- n := test.n
- lda := test.lda
- if lda == 0 {
- lda = test.n
- }
- a := make([]float64, m*lda)
- for i := range a {
- a[i] = rnd.NormFloat64()
- }
- k := min(m, n)
- tau := make([]float64, k)
- work := make([]float64, 1)
- impl.Dgeqrf(m, n, a, lda, tau, work, -1)
- work = make([]float64, int(work[0]))
- impl.Dgeqrf(m, n, a, lda, tau, work, len(work))
-
- k = test.k
- if k == 0 {
- k = n
- }
- q := constructQK("QR", m, n, k, a, lda, tau)
-
- impl.Dorg2r(m, n, k, a, lda, tau, work)
-
- // Check that the first n columns match.
- same := true
- for i := 0; i < m; i++ {
- for j := 0; j < n; j++ {
- if !floats.EqualWithinAbsOrRel(q.Data[i*q.Stride+j], a[i*lda+j], 1e-12, 1e-12) {
- same = false
- break
- }
- }
- }
- if !same {
- fmt.Println()
- fmt.Println("a =")
- printRowise(a, m, n, lda, false)
- fmt.Println("q =")
- printRowise(q.Data, q.Rows, q.Cols, q.Stride, false)
- t.Errorf("Q mismatch")
- }
- }
-}