[rrd-users] heat map support
linux at thehobsons.co.uk
Mon Aug 9 08:54:41 CEST 2010
Stefan Parvu wrote:
>Any ideas if I can produce a heat map using
You mean what is effectively a bitmap where the colour of each pixel
represents the value stored in a 2 dimensional array ? Well
potentially you could do it, but only by a lot of messing around to
massage the data into an un-natural form.
The only way I could see it working would be to have each row of
pixels as a separate DS, and then use multiple conditional statements
to map values to multiple CDEFs for colours or "Nan"s, do multiple
plots to get that row of pixels in the graph - rinse and repeat for
It would be hard work and isn't what RRDtool is designed for. I'd
suggest you'd be better with one of the other free tools that is
designed for that sort of thing. GNUplot ?
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