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// Copyright ©2017 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 unit_test
import (
"fmt"
"gonum.org/v1/gonum/unit"
)
func ExampleNew() {
// Create an angular acceleration of 3 rad/s^2
accel := unit.New(3.0, unit.Dimensions{unit.AngleDim: 1, unit.TimeDim: -2})
fmt.Println(accel)
// Output: 3 rad s^-2
}
func ExampleNewDimension() {
// Create a "trees" dimension
// Typically, this should be used within an init function
treeDim := unit.NewDimension("tree")
countPerArea := unit.New(0.1, unit.Dimensions{treeDim: 1, unit.LengthDim: -2})
fmt.Println(countPerArea)
// Output: 0.1 tree m^-2
}
func Example_horsepower() {
// One mechanical horsepower ≡ 33,000 ft-lbf/min.
foot := unit.Length(0.3048)
pound := unit.Mass(0.45359237)
gravity := unit.Acceleration(9.80665)
poundforce := pound.Unit().Mul(gravity)
hp := ((33000 * foot).Unit().Mul(poundforce)).Div(unit.Minute)
fmt.Println("1 hp =", hp)
watt := unit.Power(1)
fmt.Println("W is equivalent to hp?", unit.DimensionsMatch(hp, watt))
// Output:
//
// 1 hp = 745.6998715822701 kg m^2 s^-3
// W is equivalent to hp? true
}
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