Hello guys. All right? First of all, I apologize for my poor English. I'm new here and I've never used Scilab either. However I came across a problem and I believe that SciLab can be very useful. So for a total beginner, I ask for your help. If I can solve my problem, I will endeavor to study SciLab in more depth. The point is this. I need to trace some isosurfaces. For example (only a random example) x ^ 2 + y ^ 2 + z ^ 2 = r, where r = 1, r = 2 and r = 3. Or another random example (y-z) ² + (z-x) ² + (x-y) ² = 3R², where R = 1, R = 2 and R = 3. Neither of the two examples refers to my function, but I believe that with these examples I can trace my surfaces. In my case I should include intervals for x, y, and z. For example x (0 to 1), y (200 to 300) and z (80 to 100). Thanks in advance for the willingness to help.