#! /bin/sh

[ -e test.rrd ] && rm test.rrd
[ -e test.png ] && rm test.png

rrdtool create test.rrd             \
            --start 920804400          \
            DS:speed:COUNTER:600:U:U   \
            RRA:AVERAGE:0.5:1:24       \
            RRA:AVERAGE:0.5:6:10

rrdtool update test.rrd 920804700:12345 920805000:12357 920805300:12363
rrdtool update test.rrd 920805600:12363 920805900:12363 920806200:12373
rrdtool update test.rrd 920806500:12383 920806800:12393 920807100:12399
rrdtool update test.rrd 920807400:12405 920807700:12411 920808000:12415
rrdtool update test.rrd 920808300:12420 920808600:12422 920808900:12423

perl -e 'use lib qw( /usr/local/rrdtool-1.0.41/lib/perl ../lib/perl ); use RRDs;
         RRDs::graph ("test.png", "--start=920804400", "--end=920808000",
         "DEF:myspeed=test.rrd:speed:AVERAGE", "LINE2:myspeed#FF0000");'

