I would like to plot a figure to PNG format (avoiding using convert), however my Gnuplot distribution does not offer the PNGCAIRO terminal. How can I install/enable it? I use Gnuplot 4.4, patchlevel 2 on Mac OS X 10.6.
[me]machine @ test $ gnuplot
G N U P L O T
Version 4.4 patchlevel 2
last modified Wed Sep 22 12:10:34 PDT 2010
System: Darwin 10.8.0
Copyright (C) 1986-1993, 1998, 2004, 2007-2010
Thomas Williams, Colin Kelley and many others
gnuplot home: http://www.gnuplot.info
faq, bugs, etc: type "help seeking-assistance"
immediate help: type "help"
plot window: hit 'h'
Terminal type set to 'x11'
gnuplot> set terminal pngcairo
^
unknown or ambiguous terminal type; type just 'set terminal' for a list