interpolate - nodef/extra-array GitHub Wiki
Estimate new values between existing ones.
Similar: interleave, intermix, interpolate, intersperse.
function interpolate(x, fc)
// x: an array
// fc: combine function (a, b)
const xarray = require('extra-array');
var x = [1, 2, 3];
xarray.interpolate(x, (a, b) => (a + b)/2);
// → [ 1, 1.5, 2, 2.5, 3 ]