Contour maps

 

In Reduce

For comparison with other CAS choose from: Axiom Derive Macsyma Maple Mathematica

inputs outputs

• contour map of a function with 2 parameters

      plot_xmesh:=plot_ymesh:=40;
  
      plot(sin(x+cos y), x=(0 .. 3*pi/2), y=(0 .. 3*pi/2),
           contour,nosurface,view="0,0");
   

  
• contour map of another function with 2 parameters

      plot_xmesh:=plot_ymesh:=80;
  
      plot(tan(x*y), x=(-pi .. pi), y=(-pi .. pi), z=(-3 .. 3),
           contour,nosurface,view="0,0");
   

  
• contour map of yet another function with 2 parameters

      plot_xmesh:=plot_ymesh:=30;
  
      plot(e^(-sqrt(x^2+y^2))*cos(atan(x/y)), x=(-1 .. 1), y=(-1 .. 1),
           contour,nosurface,view="0,0");