github.com/gopherd/gonum@v0.0.4/stat/distuv/norm_example_test.go (about)

     1  // Copyright ©2017 The Gonum Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package distuv_test
     6  
     7  import (
     8  	"fmt"
     9  
    10  	"github.com/gopherd/gonum/stat"
    11  	"github.com/gopherd/gonum/stat/distuv"
    12  )
    13  
    14  func ExampleNormal() {
    15  	// Create a normal distribution
    16  	dist := distuv.Normal{
    17  		Mu:    2,
    18  		Sigma: 5,
    19  	}
    20  
    21  	data := make([]float64, 1e5)
    22  
    23  	// Draw some random values from the standard normal distribution
    24  	for i := range data {
    25  		data[i] = dist.Rand()
    26  	}
    27  
    28  	mean, std := stat.MeanStdDev(data, nil)
    29  	meanErr := stat.StdErr(std, float64(len(data)))
    30  
    31  	fmt.Printf("mean= %1.1f ± %0.1v\n", mean, meanErr)
    32  
    33  	// Output:
    34  	// mean= 2.0 ± 0.02
    35  }