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util.go
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util.go
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package chart
import (
"math"
)
func minimum(data []float64) float64 {
if data == nil {
return math.NaN()
}
min := data[0]
for i := 1; i < len(data); i++ {
if data[i] < min {
min = data[i]
}
}
return min
}
func maximum(data []float64) float64 {
if data == nil {
return math.NaN()
}
max := data[0]
for i := 1; i < len(data); i++ {
if data[i] > max {
max = data[i]
}
}
return max
}
func imin(a, b int) int {
if a < b {
return a
}
return b
}
func imax(a, b int) int {
if a > b {
return a
}
return b
}
func iabs(a int) int {
if a < 0 {
return -a
}
return a
}
func isign(a int) int {
if a < 0 {
return -1
}
if a == 0 {
return 0
}
return 1
}
func clip(x, l, u int) int {
if x < imin(l, u) {
return l
}
if x > imax(l, u) {
return u
}
return x
}
func fmax(a, b float64) float64 {
if a > b {
return a
}
return b
}
func fmin(a, b float64) float64 {
if a < b {
return a
}
return b
}