added notes on INF

git-svn-id: svn://svn.oetiker.ch/rrdtool/branches/1.2@394 a5681a0c-68f1-0310-ab6d-d61299d08faa

diff --git a/program/doc/rrdgraph_rpn.src b/program/doc/rrdgraph_rpn.src
index 1f701d3543b7c73b803a7a68d34d2f7154a8a5e6..51ed056341a556577cb7427f7a59544ce0e6e560 100644 (file)
--- a/program/doc/rrdgraph_rpn.src
+++ b/program/doc/rrdgraph_rpn.src
@@ -253,6 +253,7 @@ I<Unknown> values are considered lower than any finite number for this
 purpose so if this operator returns an I<unknown> you have quite a lot
 of them in your data.  B<Inf>inite numbers are lesser, or more, than the
 finite numbers and are always more than the I<Unknown> numbers.
+(NaN E<lt> -INF E<lt> finite values E<lt> INF)
 
 Example: C<VDEF:perc95=mydata,95,PERCENT>