Merge pull request #201 from Bytom/v0.1

[bytom/vapor.git] / vendor / gonum.org / v1 / gonum / lapack / testlapack / dlacn2.go

diff --git a/vendor/gonum.org/v1/gonum/lapack/testlapack/dlacn2.go b/vendor/gonum.org/v1/gonum/lapack/testlapack/dlacn2.go
deleted file mode 100644 (file)
index 4add8dc..0000000
--- a/vendor/gonum.org/v1/gonum/lapack/testlapack/dlacn2.go
+++ /dev/null
@@ -1,73 +0,0 @@
-// 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/blas"
-       "gonum.org/v1/gonum/blas/blas64"
-)
-
-type Dlacn2er interface {
-       Dlacn2(n int, v, x []float64, isgn []int, est float64, kase int, isave *[3]int) (float64, int)
-}
-
-func Dlacn2Test(t *testing.T, impl Dlacn2er) {
-       rnd := rand.New(rand.NewSource(1))
-       for _, n := range []int{1, 2, 3, 4, 5, 7, 10, 15, 20, 100} {
-               for cas := 0; cas < 10; cas++ {
-                       a := randomGeneral(n, n, n, rnd)
-
-                       // Compute the 1-norm of A explicitly.
-                       var norm1 float64
-                       for j := 0; j < n; j++ {
-                               var sum float64
-                               for i := 0; i < n; i++ {
-                                       sum += math.Abs(a.Data[i*a.Stride+j])
-                               }
-                               if sum > norm1 {
-                                       norm1 = sum
-                               }
-                       }
-
-                       // Compute the estimate of 1-norm using Dlanc2.
-                       x := make([]float64, n)
-                       work := make([]float64, n)
-                       v := make([]float64, n)
-                       isgn := make([]int, n)
-                       var (
-                               kase  int
-                               isave [3]int
-                               got   float64
-                       )
-               loop:
-                       for {
-                               got, kase = impl.Dlacn2(n, v, x, isgn, got, kase, &isave)
-                               switch kase {
-                               default:
-                                       panic("Dlacn2 returned invalid value of kase")
-                               case 0:
-                                       break loop
-                               case 1:
-                                       blas64.Gemv(blas.NoTrans, 1, a, blas64.Vector{1, x}, 0, blas64.Vector{1, work})
-                                       copy(x, work)
-                               case 2:
-                                       blas64.Gemv(blas.Trans, 1, a, blas64.Vector{1, x}, 0, blas64.Vector{1, work})
-                                       copy(x, work)
-                               }
-                       }
-
-                       // Check that got is either accurate enough or a
-                       // lower estimate of the 1-norm of A.
-                       if math.Abs(got-norm1) > 1e-8 && got > norm1 {
-                               t.Errorf("Case n=%v: not lower estimate. 1-norm %v, estimate %v", n, norm1, got)
-                       }
-               }
-       }
-}