三维参数方程作图:例 MOBIUS带 Clearr x, y, z: a=2.0: b-0.5;rIt v: a+b v Cos t/2 xt, v:rt,v Cost; ylt, v rt, v Sint zt,v: b v Sin t/2; ParametricPlot3DRxt,vl ylt, vl, zt, v,t,- 35,3},,-1,1}, Plotpoints->20三维参数方程作图：例 MOBIUS带 Clear[r,x,y,z];a=2.0;b=0.5;r[t_,v_]:=a+b vCos[t/2]; x[t_,v_]:=r[t,v] Cos[t]; y[t_,v_]:=r[t,v] Sin[t]; z[t_,v_]:=b v Sin[t/2]; ParametricPlot3D[{x[t,v],y[t,v],z[t,v]},{t,- 3.5,3},{v,-1,1},PlotPoints->20]