3-D Function Plot

Plot a function of two variables for
-1<=x<=1 and -1<=y<=1

Enter the formula using:
x y r t pi * / + - ( ) sin cos exp ln abs sqrt
and real constants.

Try the following

• exp(-r*r*10)
• y*y*y
• sin(pi*x)
• cos(5*y)/5 (rotation angle=0)
• (x*x-y*y)/3
• -r*r
• r*r/3
• cos(r*10)/50
• 1/r
• x*x*x/3-x*y*y (Monkey saddle)