Strangely, with [y,0,2], the line is bumpy, though with [y,0,1.9] or [y,0,2.1] it is straight. I can't seem to reproduce those little bumps with other [y] values. -dae Leo Butler wrote: > Set the y-range: > > wxplot2d([(sin (x))^2 +(cos(x))^2], [x,-5,5],[y,0,2])$