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