# Example 5 - Contouring ungridded data

# Data from figure
# 5 of Koch et al., 1983, J. Climate Appl. Met.,
# volume 22, pages 1487-1503.
open example5.dat
read columns x y z
close
set x size 12
set x axis 0 12 2
set y size 10
set y axis 0 10 2
draw axes
set line width symbol 0.2
set symbol size 0.2
draw symbol bullet
set font size 8
draw values
set x grid 0 12 0.25
set y grid 0 10 0.25

# Use default method (Barnes)
convert columns to grid

set font size 10
draw contour 0 40 2
set font size 12
draw title "Example 5 -- wind (Fig5 Koch et al, 1983)"

