# set terminal svg size 600,400 dynamic enhanced fname 'arial'  fsize 10 mousing name "surface2_6" butt solid 
# set output 'surface2.6.svg'
set dummy u,v
set key bmargin center horizontal Right noreverse enhanced autotitles nobox
set parametric
set view 45, 50, 1, 1
set isosamples 100, 20
set hidden3d back offset 1 trianglepattern 3 undefined 1 altdiagonal bentover
set ticslevel 0
set title "Parametric Helix" 
set urange [ 0.00000 : 31.4159 ] noreverse nowriteback
set vrange [ 0.00000 : 6.28319 ] noreverse nowriteback
splot (1-0.1*cos(v))*cos(u),(1-0.1*cos(v))*sin(u),0.1*(sin(v)+u/1.7-10)