Graph portmon values (Lua)

This example shows how you can graph arbitrary data, in this case the output from $tcp_portmon

-- Conky Lua scripting example
--
-- This is a helper script to graph the output of tcp_portmon count
--
-- in your conkyrc, use something like so:
-- lua_load ~/portmon_graph.lua
-- ...
-- TEXT
-- ...
-- ${lua_parse update_count ${tcp_portmon 6881 6999 count}}${lua_graph get_count}
--
do
	local count = 0

	function conky_update_count(arg)
		count = tonumber(string.match(arg, '(%d+)'))
		return ''
	end

	function conky_get_count()
		return count
	end
end