This is a simple example of a 1 dimensional lookup table with linear interpolation in Go.

lookup1d.go

// This is a simple example of a 1 dimensional lookup table with linear interpolation.
package main

import (
	"fmt"
)

type table struct {
	axis   []float64
	values []float64
}

func main() {

	// Create slices for table
	ax := []float64{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10}
	vals := []float64{0, 100, 200, 300, 400, 500, 600, 700, 800, 900, 1000}

	// Value to be used against lookup table.
	// When axis = values then the table output should equal the input.
	var inputVal float64 = 2.45

	// Create table from slices
	//t := table{axis: a, values: v}

	for i, v := range ax {
		if v >= inputVal {
			x1, x2 := ax[i-1], ax[i]
			fmt.Println("Input:", inputVal)
			fmt.Println("Value between: ", x1, x2)

			// Lazily done... probably can be simplified.
			output := (((inputVal-x1)/(x2-x1))*(vals[i]-vals[i-1]) + vals[i-1])
			fmt.Println("The output value is: ", output)
			break
		}

	}
}