+++ /dev/null
-// 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 (
- "math"
- "testing"
-
- "golang.org/x/exp/rand"
-
- "gonum.org/v1/gonum/lapack"
-)
-
-type Dlanster interface {
- Dlanst(norm lapack.MatrixNorm, n int, d, e []float64) float64
- Dlanger
-}
-
-func DlanstTest(t *testing.T, impl Dlanster) {
- rnd := rand.New(rand.NewSource(1))
- for _, norm := range []lapack.MatrixNorm{lapack.MaxAbs, lapack.MaxColumnSum, lapack.MaxRowSum, lapack.NormFrob} {
- for _, n := range []int{1, 3, 10, 100} {
- for cas := 0; cas < 100; cas++ {
- d := make([]float64, n)
- for i := range d {
- d[i] = rnd.NormFloat64()
- }
- e := make([]float64, n-1)
- for i := range e {
- e[i] = rnd.NormFloat64()
- }
-
- m := n
- lda := n
- a := make([]float64, m*lda)
- for i := 0; i < n; i++ {
- a[i*lda+i] = d[i]
- }
- for i := 0; i < n-1; i++ {
- a[i*lda+i+1] = e[i]
- a[(i+1)*lda+i] = e[i]
- }
- work := make([]float64, n)
- syNorm := impl.Dlanst(norm, n, d, e)
- geNorm := impl.Dlange(norm, m, n, a, lda, work)
- if math.Abs(syNorm-geNorm) > 1e-12 {
- t.Errorf("Norm mismatch: norm = %v, cas = %v, n = %v. Want %v, got %v.", string(norm), cas, n, geNorm, syNorm)
- }
- }
- }
- }
-}