# # Show some of the new parametric capabilities. # set parametric set dummy t set autoscale set samples 160 set title "" set key box set key below plot t,sin(t)/t title "t,sin(t)/t or sin(x)/x" pause -1 "Hit return to continue" plot sin(t)/t,t pause -1 "Hit return to continue" plot sin(t),cos(t) pause -1 "Hit return to continue" set xrange [-3:3] set yrange [-3:3] set title "Parametric Conic Sections" plot -t,t,cos(t),cos(2*t),2*cos(t),sin(t),-cosh(t),sinh(t) set title "" pause -1 "Hit return to continue" set xrange [-5:5] set yrange [-5:5] plot tan(t),t,t,tan(t) pause -1 "Hit return to continue" set trange [0.00001:3] plot t,log(t),-t,log(t),sin(t),t**2,-sin(t),t**2 pause -1 "Hit return to continue" set autoscale x set yrange [-1.5:1.5] set trange [0.0001:10*pi] plot sin(t)/t,cos(t)/t pause -1 "Hit return to continue" # # Decouple range of parametric axes u/v from that of display axes x/y/z # reset set label 1 "Decouple range of parametric axes u/v\nfrom that of display axes x/y/z" set label 1 at screen 0.1, 0.9 unset colorbox set palette cubehelix cycle 3 set view equal xyz set view 120, 300 set xyplane 0 set pm3d depthorder set border 4095 set tics scale 0 set format "" set angles radians xx(u, v) = cos(v) * cos(u) yy(u, v) = cos(v) * sin(u) zz(u, v) = sin(v) color(u, v) = sin(2*u)+sin(2*v) # set parametric set isosamples 121, 61 set samples 121, 61 set urange [-pi:pi] set vrange [-pi/2:pi/2] set xrange [-1:1] set yrange [-1:1] set zrange [-1:1] splot "++" using (xx($1,$2)):(yy($1,$2)):(zz($1,$2)):(color($1,$2)) with pm3d notitle pause -1 # undo what we've done above reset
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