Hi,
I have 2 thresholds: normal and high.
Algorithm should be following:
if (x < normal)
color = green
if(normal < x < high)
color = yellow
if(x > high)
color = red
For AREA type graphs I can do it just fine. However there is a problem
with LINE type graphs. When I implement this algorithm for LINE graphs I
get multiple disconnected segments because my CDEF takes point which is
less then threshold and the next point is greater then threshold.
What i need is something like this for the red state:
if(xprev < high && high < x) {
return high;
}
if(xprev > high && x < high) {
return high;
}
return x;
My question is how I can do this in RPN notation for RRDtool.
In particular how I can implement logical operations(guess i can get and by
checking 1+1=2) and return statement.
--
Sasha Mikheev Linux -- put a penguin in your processor
Avalon Net Ltd, CTO
http://avalon-net.co.il/~sasha
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