Updated to upstream version 1.4.8.

[pkg-rrdtool.git] / doc / rrdgraph_rpn.1

diff --git a/doc/rrdgraph_rpn.1 b/doc/rrdgraph_rpn.1
index a9ca9c63233b81a3f3632c7fba9a1c2c0aef32d4..9c600720fd5847476e80e82f5cf7cb986ea959ad 100644 (file)
--- a/doc/rrdgraph_rpn.1
+++ b/doc/rrdgraph_rpn.1
@@ -1,4 +1,4 @@
-.\" Automatically generated by Pod::Man 2.1801 (Pod::Simple 3.08)
+.\" Automatically generated by Pod::Man 2.25 (Pod::Simple 3.16)
 .\"
 .\" Standard preamble:
 .\" ========================================================================
@@ -124,7 +124,7 @@
 .\" ========================================================================
 .\"
 .IX Title "RRDGRAPH_RPN 1"
-.TH RRDGRAPH_RPN 1 "2009-06-09" "1.3.999" "rrdtool"
+.TH RRDGRAPH_RPN 1 "2013-05-23" "1.4.8" "rrdtool"
 .\" For nroff, turn off justification.  Always turn off hyphenation; it makes
 .\" way too many mistakes in technical documents.
 .if n .ad l
@@ -176,7 +176,8 @@ would do \f(CW\*(C`a = b, 3, +, 5, *\*(C'\fR without the need for parentheses.
 .Sp
 Pop two elements from the stack, compare them for the selected condition
 and return 1 for true or 0 for false. Comparing an \fIunknown\fR or an
-\&\fIinfinite\fR value will always result in 0 (false).
+\&\fIinfinite\fR value will result in \fIunknown\fR returned ... which will also be
+treated as false by the \fB\s-1IF\s0\fR call.
 .Sp
 \&\fB\s-1UN\s0, \s-1ISINF\s0\fR
 .Sp
@@ -378,7 +379,7 @@ rrdtool graph image.png \-\-imgformat=PNG \e
  TICK:exceeds#aa000080:1
 .Sp
 Note: Experience has shown that a factor between 3 and 5 to scale sigma is a good 
-discriminator to detect abnormal behaviour. This obviously depends also on the type 
+discriminator to detect abnormal behavior. This obviously depends also on the type 
 of data and how \*(L"noisy\*(R" the data series is.
 .Sp
 This prediction can only be used for short term extrapolations \- say a few days into the future\-
@@ -457,15 +458,14 @@ Returns the standard deviation of the values.
 Example: \f(CW\*(C`VDEF:stdev=mydata,STDEV\*(C'\fR
 .IP "\s-1LAST\s0, \s-1FIRST\s0" 4
 .IX Item "LAST, FIRST"
-Return the last/first value including its time.  The time for
-\&\s-1FIRST\s0 is actually the start of the corresponding interval, whereas
-\&\s-1LAST\s0 returns the end of the corresponding interval.
+Return the last/first non-nan or infinite value for the selected data
+stream, including its timestamp.
 .Sp
 Example: \f(CW\*(C`VDEF:first=mydata,FIRST\*(C'\fR
 .IP "\s-1TOTAL\s0" 4
 .IX Item "TOTAL"
 Returns the rate from each defined time slot multiplied with the
-step size.  This can, for instance, return total bytes transfered
+step size.  This can, for instance, return total bytes transferred
 when you have logged bytes per second. The time component returns
 the number of seconds.
 .Sp