Well, I realize that this type of "auto" layout is not trivial in the slightest. If I have a chance I may look into it. My first goal was to confirm that I wasn't missing some obvious solution in the command-line options.
The reason I'm using the alt- methods is because I want to get a zoomed in view of my data. The default methods would generate a scale from 10 to 20, which for my data basically become a flat line. For my use case, I'm very interested in seeing if the line is trending up or down. So for example, a difference of 0.05 +/- on the graph is important to be able to see. On Wed, Jul 7, 2010 at 8:13 PM, Tobias Oetiker <[email protected]> wrote: > Hi Casey, > > auto scaling is tough ... note that alt-y-grid and alt-autoscale > are two independent 'fixes'. Used together, they can produce rather > interesting results ... the two instances of 13 in the graph come > from the fact that one of the two insist on putting at least two > labels to the graph .. that they are both '13' is because the > difference between the two is > 1 > > I still claim that my original algorithm (the thing you get without > the --alt* options when you just run rrdtool) is the most robust > one ... :-) but, by all means, if you see ways to generically > improve autoscaling, or add another alt-* algorithm, I would be > most interested in your contributions ! > > cheers > tobi > > Yesterday Casey McGinty wrote: > > > I sent this to the users list, but didn't get any response. The code > below > > creates some weirdness on the Y-axis. Can I just force rrdgraph to output > > unit labels with 1 decimal place. Right now the graph gives me two > labeled > > lines, both are "13". > > > > ---------- Forwarded message ---------- > > From: Casey McGinty <[email protected]> > > Date: Tue, Jul 6, 2010 at 8:37 PM > > Subject: Problems w/ Y-Axis Units > > To: [email protected] > > > > > > Hi, > > > > Can someone show me how to get a better Y-axis on this graph? It would be > > nice if it could indicate the first decimal value. I know --rigid will > > adjust the range enough to fix it, but I like having a little padding on > the > > top and bottom. I'm running RRDtool 1.3.8 > > > > rrdtool create test.rrd \ > > --step 36000\ > > --start 1278216000\ > > DS:test:GAUGE:36000:U:U \ > > RRA:AVERAGE:0:1:450 > > > > rrdtool update test.rrd 1278216000:1.2995109312e+01 > > rrdtool update test.rrd 1278252000:1.2386894574e+01 > > rrdtool update test.rrd 1278288000:1.2756351457e+01 > > rrdtool update test.rrd 1278324000:1.2922753446e+01 > > rrdtool update test.rrd 1278360000:1.2355706091e+01 > > rrdtool update test.rrd 1278396000:1.3136786020e+01 > > rrdtool update test.rrd 1278432000:1.2281093692e+01 > > rrdtool update test.rrd 1278468000:1.2874299159e+01 > > > > rrdtool graph test.png --start 1262304000 --end 1278468000 \ > > --alt-autoscale \ > > --alt-y-grid \ > > --width 450 \ > > --height 125 \ > > DEF:test=test.rrd:test:AVERAGE \ > > LINE1:test#FF0000:test > > > > -- > Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten, Switzerland > http://it.oetiker.ch [email protected] ++41 62 775 9902 / sb: -9900 >
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