compute method

@override double compute(double x)

Returns the y value of the y = f(x) equation where the function f is built by interpolating the given nodes nodes and x is the given point at which the function has to be evaluated.

Implementation

@override
double compute(double x) {
  var result = 0.0;

  for (var i = 0; i < nodes.length; ++i) {
    var term = nodes[i].y;
    for (var j = 0; j < nodes.length; j++) {
      if (i != j) {
        term *= (x - nodes[j].x) / (nodes[i].x - nodes[j].x);
      }
    }
    result += term;
  }

  return result;
}