piecewiselinear
A tiny library for linear interpolation. O(log(N)) per evaluation for N control points.
import "github.com/sgreben/piecewiselinear"Get it
go get -u "github.com/sgreben/piecewiselinear"Use it
import "github.com/sgreben/piecewiselinear"
func main() {
f := piecewiselinear.Function{Y:[]float64{0,1,0}} // range: "hat" function
f.X = piecewiselinear.Span(0, 1, len(f.Y)) // domain: equidistant points along X axis
fmt.Println(
f.At(0), // f.At(x) evaluates f at x
f.At(0.25),
f.At(0.5),
f.At(0.75),
f.At(1.0),
f.At(123.0), // outside its domain X the function is constant 0
f.At(-123.0), //
)
// Output:
// 0 0.5 1 0.5 0 0 0
}