var fDesc=new Array(); fDesc[0] = "RobustFit is a free utility programme for robust locally-weighted scatterplot smoothing (Lowess), or robustly fitting data to a polynomial function.

Lowess Smoothing

A standard way of smoothing data to reduce noise is to apply a moving average (MA) filter. The MA filter works by replacing each data point by the average of itself and a number of data points within a user-determined window on either side of the point in question.

Robust polynomial fitting does not use a moving window, but fits the entire data set to a polynomial function, without any location-specific weighting"; function tShowHide(id, show) { var s = document.getElementById("desc"); if ((s.innerHTML.length<=212 || show==1) && show!=2) { s.innerHTML = fDesc[id]; if (document.getElementById('m1')) document.getElementById('m1').style.display='none'; if (document.getElementById('m2')) document.getElementById('m2').style.display='none'; if (document.getElementById('more_txt')) document.getElementById('more_txt').style.display='inline'; } else { s.innerHTML = ''; } }