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#
# Demonstrates how to derive variable font size from a data file column.
#
# If you are viewing this via the HTML canvas terminal, be sure to toggle
# the font scaling icon so that the fonts change size as you zoom in.
#
Scale(size) = 0.25*sqrt(sqrt(column(size)))
CityName(String,Size) = sprintf("{/=%d %s}", Scale(Size), stringcolumn(String))
set termoption enhanced
set encoding utf8
unset xtics
unset ytics
unset key
set border 0
set size square
set datafile separator "\t"
plot 'cities.dat' using 5:4:($3 < 5000 ? "-" : CityName(1,3)) with labels
pause -1 "hit return to continue"
reset
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