# set terminal svg size 600,400 dynamic enhanced fname 'arial' fsize 10 mousing name "surface2_7" butt solid # set output 'surface2.7.svg' set dummy u,v set key bmargin center horizontal Right noreverse enhanced autotitles nobox set parametric set view 50, 30, 1, 1 set isosamples 40, 20 set hidden3d back offset 1 trianglepattern 3 undefined 1 altdiagonal bentover set style data lines set ticslevel 0 set title "Parametric Shell (clipped to limited z range)" set urange [ 0.00000 : 6.28319 ] noreverse nowriteback set vrange [ 0.00000 : 6.28319 ] noreverse nowriteback set zrange [ -3.00000 : 1.50000 ] noreverse nowriteback splot cos(u)*u*(1+cos(v)/2),sin(v)*u/2,sin(u)*u*(1+cos(v)/2)