cmath

A core math module for golang, with statistics, histogram, points, ranges and more math tools. This module is almost a port of the core and math libraries of Aforge.Net.

Usage

Points

A data structure for representing a pair of coordinates.

• Creating two points. An int point and a float point.

p2 := NewPoint(2, 2)
p3 := NewPoint(2.5, 3.775)

• Adding two points

result := p1.Sum(p2)

• Calculates the euclidean distance between two points.

distance := p2.DistanceTo(p3)

Histogram

A histogram for discrete values.

• Initializing a new histogram.

hist := NewHistogram([]int{1, 2, 3, 10, 3, 2, 1})

// returning the mean, standard deviation, min, and max values.

mean := hist.Mean()
stddev := hist.StdDev()
min := hist.Min()
max := hist.Max()

Ranges

Generic data structure that represents an integer or float interval.

• Initializes a new range and check if some values are in inside the interval.

r1 := NewRange(-0.5, 1.0)
r2 := NewRange(1.0, 0.7)

if r1.IsRangeInside(r2) {
    println("r2 is inside r1")
}

if r1.IsInside(0.2) {
    println("0.2 is inside the interval")
}

Statistics

Set of statistics functions for golang.

• Calculates histogram's entropy.

entropy := statistics.Entropy([]int{1, 2, 3, 5})

Vectors

3D vector structure with x, y, z coordinates.

• Initializing vectors.

v1 := cmath.NewVec3(3.0, 2.0, 1.0)
// calculates the dot product with himself
result := v1.Dot()
v2 := cmath.NewVec3(1.0, 2.0, 3.0)
// calculates the dot product of two vectors
dotresult := cmath.Dot(v1, v2)
crossresult := cmath.Cross(v1, v2)
// sum two vectors
sumresult := v1.Sum(v2)

Polish expressions

References