[rrd-users] Re: Changing line color

Alex van den Bogaerdt alex at ergens.op.het.net
Thu Jan 23 23:09:39 MET 2003

On Thu, Jan 23, 2003 at 03:29:22PM -0500, Vargas, Miguel wrote:

> Is it possible to do changing colors on LINE? graphs?  The AREA trick
> doesn't work on line graphs because the lines aren't connected, this is
> especially noticeable on low resolution graphs.  For example I tried this
> DEF:in=my.rrd:In:AVERAGE 
> CDEF:under=in,34000,LT,in,UNKN,IF 
> CDEF:over=in,34000,GT,in,34000,-,UNKN,IF 
> LINE2:under#00ff00 
> STACK:over#ff0000
> And here is what it looks like: http://miguel.vargas.com/test.png.


This picture seems to show two normal lines, not one stacked on top
of the other.

I do see the gaps.  From what I see on the graph, you are displaying
the red line between 09:15 (or so) and 18:15 (or so).

If you do indeed use LTIME, make the two lines overlap.

pseudo code:

   if (time >= 09:15) and (time <= 18:15) then display in red
   else display in green
   if (time >= 09:15) and (time <= 18:15) then display in red
   if (time <= 09:15) or  (time >= 18:15) then display in green

Never tried this, but should work in theory.

Much of what looks like rudeness in hacker circles is not intended to give
offence. Rather, it's the product of the direct, cut-through-the-bullshit
communications style that is natural to people who are more concerned about
solving problems than making others feel warm and fuzzy.


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