[rrd-users] X-axis labels incorrect

[Petteri Matilainen]

Hello,

I'm graphing temperature, see http://koti.welho.com/pmatil/out_day.png.
Look at the x-axis labels. They should be at 2 hour intervals. But after
02:00 the next label is 03:00 and then at 2 hour intervals. What is
happening? The x-axis label is constructed using

-x MINUTE:30:HOUR:1:HOUR:2:0:"%H:%M"

Also in the picture you see the issue I mentioned in my previous
message, the y-axis labels which are for some reason floats, eg. 0.0,
1.0, 2.0 etc. Any ideas? Thanks!

regards,

Petteri

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[Tobias Oetiker]

On 28.10.2012, at 15:59, Petteri Matilainen <pma...@gmail.com> wrote:

> Hello,
>
> I'm graphing temperature, see http://koti.welho.com/pmatil/out_day.png.
> Look at the x-axis labels. They should be at 2 hour intervals. But after
> 02:00 the next label is 03:00 and then at 2 hour intervals. What is
> happening? The x-axis label is constructed using
>
> -x MINUTE:30:HOUR:1:HOUR:2:0:"%H:%M"
>
> Also in the picture you see the issue I mentioned in my previous
> message, the y-axis labels which are for some reason floats, eg. 0.0,
> 1.0, 2.0 etc. Any ideas? Thanks!
>

yes tonight, there were 2 hours between 2am and 3am ... at least in the timezone where this chart was generated ... (end of daylight saving time)

cheers tobi

[Alex van den Bogaerdt]

> I'm graphing temperature, see http://koti.welho.com/pmatil/out_day.png.
> Look at the x-axis labels. They should be at 2 hour intervals. But after
> 02:00 the next label is 03:00 and then at 2 hour intervals. What is
> happening? The x-axis label is constructed using
>
> -x MINUTE:30:HOUR:1:HOUR:2:0:"%H:%M"

Just in case you need a little more than Tobi already gave you:

http://rrdtool.vandenbogaerdt.nl/summertime.php

That page is already there for some time but is as valid as it was a couple
of years ago.

HTH
Alex