Updated for VDEF TOTAL

git-svn-id: svn://svn.oetiker.ch/rrdtool/trunk/program@44 a5681a0c-68f1-0310-ab6d-d61299d08faa

diff --git a/doc/rrdgraph_rpn.pod b/doc/rrdgraph_rpn.pod
index 16c5996..f54bd38 100644 (file)
--- a/doc/rrdgraph_rpn.pod
+++ b/doc/rrdgraph_rpn.pod
@@ -201,13 +201,31 @@ Z<>
 
 =item MAXIMUM, MINIMUM, AVERAGE
 
-Return the corresponding value
+Return the corresponding value, MAXIMUM and MINIMUM also return
+the first occurance of that value in the time component.
+
+Example: C<VDEF:avg=mydata,AVERAGE>
 
 Z<>
 
 =item LAST, FIRST
 
-Return the last,first value including its time 
+Return the last,first value including its time.  The time for
+FIRST is actually the start of the corresponding interval, where
+LASTs time component returns the end of the corresponding interval.
+
+Example: C<VDEF:first=mydata,FIRST>
+
+Z<>
+
+=item TOTAL
+
+Returns the rate from each defined timeslot multiplied with the
+step size.  This can for instance return total bytes transfered
+when you have logged bytes per second. The time component returns
+the amount of seconds 
+
+Example: C<VDEF:total=mydata,TOTAL>
 
 Z<>
 
@@ -219,7 +237,7 @@ data set is then sorted and the value returned is chosen such that
 I<percentage> percent of the values is lower or equal than the result.
 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.  I<Inf>inite numbers are lesser, or more, than the
+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.
 
 Example: C<VDEF:perc95=mydata,95,PERCENT>