Help System (web edition)

More complicated functions, whose equations are long or consist of
conditional statements can be plotted by giving a definition with
one or several if-then-else statements as follows:

Example: Plotting the density function of the sum of 3 independent
         variables uniformly distributed over (0,1).
                                                                                                  .
XSCALE=0(1)3 YSCALE=0(0.1)1

PLOT y(x)=if(x<1)then(x*x/2)else(y2)
     y2=if(x<2)then(x*x/2-3*(x-1)*(x-1)/2)else((x-3)*(x-3)/2)

The statements may include parameters whose values are given
in the edit field. Also varying parameters are permitted.
  C = More information on curve plotting