[drraw-users] Stddevs and averages of multiple rrd source files

[Fabien Wernli]

On Thu, Apr 19, 2007 at 07:49:28AM -0700, Mark Noworolski wrote:
> I have multiple rrds, say: file1.rrd, file2.rrd, file3.rrd, etc. (basically
> all the files in a certain directory). Each file is identical, in terms of
> data sources (let's say each one contains temperature readings).

I believe you can only apply simple operations, like the sum, see
'drraw.cgi?Browse=Help#dsconfig', in item 'Data Source>Data Source Template'