[rrd-users] rpn to convert NaN to 0

[Alex van den Bogaerdt]

----- Original Message ----- 
From: "Mark Hedges" <mark at phix.me>
To: "R Dicaire" <kritek at gmail.com>
Cc: <rrd-users at lists.oetiker.ch>
Sent: Saturday, March 14, 2009 8:13 PM
Subject: Re: [rrd-users] rpn to convert NaN to 0


I think Alex is meaning this tutorial:

http://oss.oetiker.ch/rrdtool/tut/cdeftutorial.en.html

There are examples on that (around the middle of the page).

I'm not sure why you are now getting nothing graphed. I would only use
the IF/UN RPN statement on the value you know that could be NaN and
just customise it as you see fit.

I recently had to use this method to some across more than 100
different values, any of which could have been NaNs - produced a very
lengthy RPN expression.





Also, if using 1.2.x of newer, see ADDNAN.