Re: [Gnuplot-info] rotate labels by data column

[Ethan M. <eam...@gm...>]

On Thu, Aug 4, 2016 at 4:28 AM, Grothausmann, Roman Dr. <
gro...@mh...> wrote:

> Many thanks Ethan for the quick implementation. Works great and has no
> problems with SVGs:
> https://github.com/romangrothausmann/KursgleicheNG/blob/484c
> 11347d2bee7ad3c7503e5126d5d79f01a32a/windrose.gp
>
> Comparing the vector arrow heads and the label placement in my test
> project, reveals a slight displacement for 180° rotations which decreases
> in both directions towards 0°/360°. I wasn't able to compensate these with
> offsets.
>


That is probably due to imperfect vertical centering in the svg terminal
output.   The various gnuplot terminals are not consistent in placing
vertically-centered text; some align to the text baseline, some to the
midline, and some to whatever is possible. I suspect the svg terminal could
do a better job than it currently does.

   Ethan


>
> Thanks again for the quick feature implementation.
>
> On 03/08/16 22:32, Ethan Merritt wrote:
>
>> I like the idea, and it requires only a trivial amount of code, so...
>> in today's CVS (version 5.1)
>>
>>     http://gnuplot.sourceforge.net/demo_cvs/rotate_labels.html
>>
>> using theozh's test data:
>>
>>  plot $Data using 1:2:3:4 with labels rotate variable
>>
>>
>> Ethan
>>
>> On Tue, Aug 2, 2016 at 12:07 AM, Grothausmann, Roman Dr.
>> <gro...@mh... <mailto:grothausmann.roman@mh-
>> hannover.de>>
>> wrote:
>>
>>     Dear mailing list members,
>>
>>
>>     Is there any way to plot labels rotated according to angles given by
>> a data
>>     column?
>>     All I could find is:
>>     plot ... with labels rotate by X
>>     which, as I understand, only allows a fixed rotation for all labels.
>>
>>     Any help or hints are very much appreciated
>>     Roman
>>
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