Hello everybody, I use the following function: E := t* (1-exp(-(1-t)^2/(2*o^2))) The range of values is defined as t = [0..1] and o = [0..1]. I would like to draw the maximum value of E in the range t = [0..1] for values of o between 0 to 1. The figure should have the maximum value of E in Y-axis and the value of o in X-axis. Any idea?? Regards, Rafa.