interpolate

Estimate new values between existing ones.

Similar: interleave, intermix, interpolate, intersperse.

function interpolate(x, fc)
// x:  an array
// fc: combine function (a, b)

const array = require('extra-array');

var x = [1, 2, 3];
array.interpolate(x, (a, b) => (a + b)/2);
// → [ 1, 1.5, 2, 2.5, 3 ]