> *> Am I right in assuming that this would allow me to create a graph with
> *> hourly averages, being more than 1 pixel wide ? I mean, have one day
> *> visible and this is displayed as 24 bars ?
> 
> yes I guess so :-) ... given the data available allows for this resolution
> to be built by combining several high resolution samples or by using the
> apropriate rra ... 
> 
What I'm asked to do (don't ask me *why*) is to provide statistics
per block of hours.
Right now I used rrdtool graph to create an one-day-image, followed by
a textual representation: 12 periods of two hours like this:
(this is actual output from lynx http://myserver/rrd/,
our opening hours are 13:30 - 03:00 so they're in the middle)

       <the png is here, spanning the same amount of space>

           kilobits per second  IN       kilobits per second OUT
          maximum  minimum  average     maximum  minimum  average
   08:00    83.44     1.42     6.01      252.35     1.62    12.04
   10:00    85.51     1.40    10.40      246.39     1.57    13.09
   12:00   116.25     2.36    23.87      250.10     1.67    22.37
   14:00   124.33     5.82    50.70      135.82     4.03    37.80
   16:00    68.09     6.27    20.11      131.63     5.15    21.05
   18:00    95.78     4.18    23.32      126.84     5.03    24.79
   20:00    52.87    13.27    24.94      164.27    10.62    25.52
   22:00    72.47    13.38    26.35      254.16    11.28    36.11
   00:00    51.48    12.63    22.86       81.38     9.82    20.21
   02:00   137.57     1.26    18.34      113.00     1.54    10.78
   04:00    22.37     0.91     3.25       20.23     1.08     2.93
   06:00    79.83     1.09     5.41      255.69     1.27     7.11

It would be nice to display 12 bars with maxima, overlayed with
12 bars of averages. It would even be better to be able to have
two smaller bars next to each other, one for in and one for out.
(This will be rrdtool-2.0.0 if not 3.0.0, right :)

The bars should span two hours (08:00-09:59, 10:00-11:59 etc)
and will therefore be 34 pixels wide with a total of 408 pixels.
And to complete my wish list: one bar of 16 pixels for in, one
of 16 pixels for out, 2 pixels blank. repeat.

Regards,
Alex

BTW,
I assume this is basic stuff. If not, source available on request.

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