var data_x = [2,5,7,12,20,32,50];

var data_y = [5,10,15,20,25,30,35];

​

var cubic = function(params,x) {

  return params[0] * x*x*x +

    params[1] * x*x +

    params[2] * x +

    params[3];

};

​

var objective = function(params) {

  var total = 0.0;

  for(var i=0; i < data_x.length; ++i) {

    var resultThisDatum = cubic(params, data_x[i]);

    var delta = resultThisDatum - data_y[i];

    total += (delta*delta);

  }

  return total;

};

​

var initial = [1,1,1,1];

var minimiser = numeric.uncmin(objective,initial);

​

console.log("initial:");

for(var j=0; j<initial.length; ++j) {

  console.log(initial[j]);  

}

​

console.log("minimiser:");

for(var j=0; j<minimiser.solution.length; ++j) {

  console.log(minimiser.solution[j]);

}

​