Imported upstream version 1.4.8

[pkg-rrdtool.git] / doc / rrdgraph_rpn.txt

diff --git a/doc/rrdgraph_rpn.txt b/doc/rrdgraph_rpn.txt
index b1e92f85950bf7c58c1611760a6afc837f82a2d7..ae5cfdcb386dcf52b20093d6db7578e21580d540 100644 (file)
--- a/doc/rrdgraph_rpn.txt
+++ b/doc/rrdgraph_rpn.txt
@@ -46,7 +46,8 @@ O\bOP\bPE\bER\bRA\bAT\bTO\bOR\bRS\bS
 
            Pop two elements from the stack, compare them for the selected
            condition and return 1 for true or 0 for false. Comparing an
-           _\bu_\bn_\bk_\bn_\bo_\bw_\bn or an _\bi_\bn_\bf_\bi_\bn_\bi_\bt_\be value will always result in 0 (false).
+           _\bu_\bn_\bk_\bn_\bo_\bw_\bn or an _\bi_\bn_\bf_\bi_\bn_\bi_\bt_\be value will result in _\bu_\bn_\bk_\bn_\bo_\bw_\bn returned ...
+           which will also be treated as false by the I\bIF\bF call.
 
            U\bUN\bN,\b, I\bIS\bSI\bIN\bNF\bF
 
@@ -332,9 +333,8 @@ V\bVA\bAR\bRI\bIA\bAB\bBL\bLE\bES\bS
            Example: "VDEF:stdev=mydata,STDEV"
 
        LAST, FIRST
-           Return the last/first value including its time.  The time for FIRST
-           is actually the start of the corresponding interval, whereas LAST
-           returns the end of the corresponding interval.
+           Return the last/first non-nan or infinite value for the selected
+           data stream, including its timestamp.
 
            Example: "VDEF:first=mydata,FIRST"
 
@@ -389,4 +389,4 @@ A\bAU\bUT\bTH\bHO\bOR\bR
 
 
 
-1.4.2                             2009-10-14                   RRDGRAPH_RPN(1)
+1.4.8                             2013-05-23                   RRDGRAPH_RPN(1)