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44 lines
1.1 KiB
Go
44 lines
1.1 KiB
Go
// Copyright ©2016 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 optimize_test
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import (
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"fmt"
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"log"
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"gonum.org/v1/gonum/optimize"
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"gonum.org/v1/gonum/optimize/functions"
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)
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func ExampleMinimize() {
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p := optimize.Problem{
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Func: functions.ExtendedRosenbrock{}.Func,
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Grad: functions.ExtendedRosenbrock{}.Grad,
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}
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x := []float64{1.3, 0.7, 0.8, 1.9, 1.2}
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settings := optimize.DefaultSettingsLocal()
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settings.Recorder = nil
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settings.GradientThreshold = 1e-12
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settings.FunctionConverge = nil
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result, err := optimize.Minimize(p, x, settings, &optimize.BFGS{})
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if err != nil {
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log.Fatal(err)
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}
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if err = result.Status.Err(); err != nil {
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log.Fatal(err)
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}
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fmt.Printf("result.Status: %v\n", result.Status)
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fmt.Printf("result.X: %v\n", result.X)
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fmt.Printf("result.F: %v\n", result.F)
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fmt.Printf("result.Stats.FuncEvaluations: %d\n", result.Stats.FuncEvaluations)
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// Output:
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// result.Status: GradientThreshold
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// result.X: [1 1 1 1 1]
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// result.F: 0
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// result.Stats.FuncEvaluations: 35
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}
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