#
# Read individual point sizes from extra column of input file
# Ethan A Merritt - October 2004
#
unset key
unset border
unset yzeroaxis
unset xtics
unset ytics
unset ztics

#
# plot a 2D map with locations marked by variable sized points
#
set title "plot with variable size points"
plot 'world.dat' with lines lt 3, \
     'world.cor' using 1:2:(5.*rand(0)) with points lt 1 pt 6 ps variable

Click here for minimal script to generate this plot

#
set title "splot with variable size points\nit is possible to specify size and color separately"
set view map
unset hidden3d
splot 'world.dat' using 1:2:(0) with lines lt 3, \
      'world.cor' using 1:2:(0.5-rand(0)):(5.*rand(0)) with points pt 5 ps var lt palette

Click here for minimal script to generate this plot

#
# plot a '3D version using spherical coordinate system' of the world.
set angles degrees
set title "3D version using spherical coordinate system"
set ticslevel 0
set view 70,40,0.8,1.2
set mapping spherical
set parametric
set samples 32
set isosamples 9
set urange [-90:90]
set vrange [0:360]
splot cos(u)*cos(v),cos(u)*sin(v),sin(u) with lines lt 5,\
      'world.dat' with lines lt 3, \
      'world.cor' using 1:2:(1):(5.*rand(0)) with points lt 1 pt 6 ps variable

Click here for minimal script to generate this plot

#
# hidden3d still not working fully
# pointsize is now handled, but axes are never obscured
# 
set title "3D solid version through hiddenlining"
set hidden3d
set arrow from 0,0,-1.2 to 0,0,1.2 lt 5 lw 2
set arrow from -1.2, 0, 0 to 1.2, 0, 0 nohead lt 5 lw 1 
set arrow from 0, -1.2, 0 to 0, 1.2, 0 nohead lt 5 lw 1
splot cos(u)*cos(v),-cos(u)*sin(v),sin(u) with lines lt 5,\
      'world.dat' u 1:2:(1.001) with lines lt 3, \
      'world.cor' using 1:2:(1):(5.*rand(0))  with points lt 1 pt 6 ps var

Click here for minimal script to generate this plot