Merge pull request #201 from Bytom/v0.1

[bytom/vapor.git] / vendor / gonum.org / v1 / gonum / lapack / testlapack / dgetri.go

diff --git a/vendor/gonum.org/v1/gonum/lapack/testlapack/dgetri.go b/vendor/gonum.org/v1/gonum/lapack/testlapack/dgetri.go
deleted file mode 100644 (file)
index 7e339c1..0000000
--- a/vendor/gonum.org/v1/gonum/lapack/testlapack/dgetri.go
+++ /dev/null
@@ -1,90 +0,0 @@
-// 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"
-       "testing"
-
-       "golang.org/x/exp/rand"
-
-       "gonum.org/v1/gonum/blas"
-       "gonum.org/v1/gonum/blas/blas64"
-)
-
-type Dgetrier interface {
-       Dgetrfer
-       Dgetri(n int, a []float64, lda int, ipiv []int, work []float64, lwork int) bool
-}
-
-func DgetriTest(t *testing.T, impl Dgetrier) {
-       rnd := rand.New(rand.NewSource(1))
-       bi := blas64.Implementation()
-       for _, test := range []struct {
-               n, lda int
-       }{
-               {5, 0},
-               {5, 8},
-               {45, 0},
-               {45, 50},
-               {65, 0},
-               {65, 70},
-               {150, 0},
-               {150, 250},
-       } {
-               n := test.n
-               lda := test.lda
-               if lda == 0 {
-                       lda = n
-               }
-               // Generate a random well conditioned matrix
-               perm := rnd.Perm(n)
-               a := make([]float64, n*lda)
-               for i := 0; i < n; i++ {
-                       a[i*lda+perm[i]] = 1
-               }
-               for i := range a {
-                       a[i] += 0.01 * rnd.Float64()
-               }
-               aCopy := make([]float64, len(a))
-               copy(aCopy, a)
-               ipiv := make([]int, n)
-               // Compute LU decomposition.
-               impl.Dgetrf(n, n, a, lda, ipiv)
-               // Compute inverse.
-               work := make([]float64, 1)
-               impl.Dgetri(n, a, lda, ipiv, work, -1)
-               work = make([]float64, int(work[0]))
-               lwork := len(work)
-
-               ok := impl.Dgetri(n, a, lda, ipiv, work, lwork)
-               if !ok {
-                       t.Errorf("Unexpected singular matrix.")
-               }
-
-               // Check that A(inv) * A = I.
-               ans := make([]float64, len(a))
-               bi.Dgemm(blas.NoTrans, blas.NoTrans, n, n, n, 1, aCopy, lda, a, lda, 0, ans, lda)
-               isEye := true
-               for i := 0; i < n; i++ {
-                       for j := 0; j < n; j++ {
-                               if i == j {
-                                       // This tolerance is so high because computing matrix inverses
-                                       // is very unstable.
-                                       if math.Abs(ans[i*lda+j]-1) > 5e-2 {
-                                               isEye = false
-                                       }
-                               } else {
-                                       if math.Abs(ans[i*lda+j]) > 5e-2 {
-                                               isEye = false
-                                       }
-                               }
-                       }
-               }
-               if !isEye {
-                       t.Errorf("Inv(A) * A != I. n = %v, lda = %v", n, lda)
-               }
-       }
-}