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37 lines
1.0 KiB
Go
37 lines
1.0 KiB
Go
// Copyright ©2023 The Gonum Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package testlapack
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import (
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"math"
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"testing"
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"golang.org/x/exp/rand"
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"gonum.org/v1/gonum/lapack"
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)
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type Dlanhser interface {
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Dlanhs(norm lapack.MatrixNorm, n int, a []float64, lda int, work []float64) (resultNorm float64)
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}
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func DlanhsTest(t *testing.T, impl Dlanhser) {
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const tol = 1e-8
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work := make([]float64, 9*9)
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rnd := rand.New(rand.NewSource(1))
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for _, n := range []int{1, 2, 4, 9} {
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for _, lda := range []int{n, n + 5} {
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a := randomHessenberg(n, lda, rnd)
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for _, norm := range []lapack.MatrixNorm{lapack.MaxAbs, lapack.MaxRowSum, lapack.MaxColumnSum, lapack.Frobenius} {
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expect := dlange(norm, a.Rows, a.Cols, a.Data, a.Stride)
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got := impl.Dlanhs(norm, a.Rows, a.Data, lda, work)
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if math.Abs(expect-got)/expect > tol {
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t.Errorf("Case n=%v,lda=%v,norm=%v: unexpected result. Want %v, got %v.", n, lda, normToString(norm), expect, got)
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}
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}
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}
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}
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}
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