Function createLogFunc

app/core/utils.js:719–719

// f(x) = a log(b (x + c)) + d
const createLogFunc = params => function (x) { if (x > 0) { return ((params.a || 1) * Math.log((params.b || 1) * (x + (params.c || 0)))) + (params.d || 0) } else { return 0 } }

// f(x) = ax^b + c
const createPowFunc = params => x => ((params.a || 1) * Math.pow(x, params.b || 1)) + (params.c || 0)