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// Copyright ©2013 The Gonum Authors. All rights reserved.
// Use of this code is governed by a BSD-style
// license that can be found in the LICENSE file.
package floats_test
import (
"fmt"
"gonum.org/v1/gonum/floats"
)
// Set of examples for all the functions
func ExampleAdd_simple() {
// Adding three slices together. Note that
// the result is stored in the first slice
s1 := []float64{1, 2, 3, 4}
s2 := []float64{5, 6, 7, 8}
s3 := []float64{1, 1, 1, 1}
floats.Add(s1, s2)
floats.Add(s1, s3)
fmt.Println("s1 =", s1)
fmt.Println("s2 =", s2)
fmt.Println("s3 =", s3)
// Output:
// s1 = [7 9 11 13]
// s2 = [5 6 7 8]
// s3 = [1 1 1 1]
}
func ExampleAdd_newslice() {
// If one wants to store the result in a
// new container, just make a new slice
s1 := []float64{1, 2, 3, 4}
s2 := []float64{5, 6, 7, 8}
s3 := []float64{1, 1, 1, 1}
dst := make([]float64, len(s1))
floats.AddTo(dst, s1, s2)
floats.Add(dst, s3)
fmt.Println("dst =", dst)
fmt.Println("s1 =", s1)
fmt.Println("s2 =", s2)
fmt.Println("s3 =", s3)
// Output:
// dst = [7 9 11 13]
// s1 = [1 2 3 4]
// s2 = [5 6 7 8]
// s3 = [1 1 1 1]
}
func ExampleAdd_unequallengths() {
// If the lengths of the slices are unknown,
// use EqualLengths to check
s1 := []float64{1, 2, 3}
s2 := []float64{5, 6, 7, 8}
eq := floats.EqualLengths(s1, s2)
if eq {
floats.Add(s1, s2)
} else {
fmt.Println("Unequal lengths")
}
// Output:
// Unequal lengths
}
func ExampleAddConst() {
s := []float64{1, -2, 3, -4}
c := 5.0
floats.AddConst(c, s)
fmt.Println("s =", s)
// Output:
// s = [6 3 8 1]
}
func ExampleCumProd() {
s := []float64{1, -2, 3, -4}
dst := make([]float64, len(s))
floats.CumProd(dst, s)
fmt.Println("dst =", dst)
fmt.Println("s =", s)
// Output:
// dst = [1 -2 -6 24]
// s = [1 -2 3 -4]
}
func ExampleCumSum() {
s := []float64{1, -2, 3, -4}
dst := make([]float64, len(s))
floats.CumSum(dst, s)
fmt.Println("dst =", dst)
fmt.Println("s =", s)
// Output:
// dst = [1 -1 2 -2]
// s = [1 -2 3 -4]
}
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