There are six literature reference at the bottom of the page.
Usually, the minimum and maximum value of the y-data is determined. The interval [ymin,ymax] is divided in a certain number of subintervals (bins). According to their value, the y-data are put into the bin where they belong. Then the number of y-data in each bin is divided by the total number of y-data. Let us call these values bi (i=1,...,n = number of bins) (note that they sum to 1). Then it is set
B1 = b1
B2 = b1+b2
...
Bn-1 = b1 + b2 + ... + bn-1
Bn = 1
and the B1,B2,...,Bn are plotted as ecdf.
