[ncl-talk] temperature spiral plot

[Karin Meier-Fleischer]

Hi Sebastian and Adam,

there is no built-in function but I wrote a script which creates the 
plots for a spiral animation of multi-year monthly mean temperature 
change data. Have a look at our DKRZ NCL examples page. At the bottom of 
the table is a small plot of the last time step and the script is also 
provided:

   https://www.dkrz.de/Nutzerportal-en/doku/vis/sw/ncl/ncl-examples

Bye,
Karin

Am 12.06.17 um 19:51 schrieb Adam Phillips:
> Hi Sebastian,
> At present NCL does not have a function that can create spiral 
> graphics. I have created a ticket for this (NCL-2623) that asks for 
> this functionality to be added, and included your feature requests. 
> Unfortunately at best this will not be added to NCL until later this 
> summer.
>
> Your idea to start with the radar_3 example coding to draw the radial 
> lines is a good one. Numerous calls to gsn_add_polyline would then 
> need to be added to draw the spirals. Interpolation between the months 
> for changing colors/widths is possible but adds complexity.
>
> If you develop your own NCL function (complete or incomplete) please 
> email it to me and I will add it to NCL-2623 so that the NCL developer 
> in charge of implementing this new functionality could possibly use 
> what you created.
> Adam
>
> On Mon, Jun 12, 2017 at 6:44 AM, Milinski, Sebastian 
> <sebastian.milinski at mpimet.mpg.de 
> <mailto:sebastian.milinski at mpimet.mpg.de>> wrote:
>
>     Dear All,
>
>     I would like to produce a plot in a similar style as the
>     well-known temperature or sea ice spiral plots (e.g.
>     http://www.climate-lab-book.ac.uk/spirals/
>     <http://www.climate-lab-book.ac.uk/spirals/>).
>
>     The angle should represent the month (1-12) and the distance from
>     the centre some value.
>     The data points for consecutive months should be connected by a line.
>
>     Has someone tried this in NCL already? What would the best
>     approach be?
>
>     I would also like to modify the line a bit:
>     - interpolate between data points rather than drawing a straight line
>     - add a colour shading to the line (e.g. representing the time
>     axis 01/1850, 02/1850, 03/1850, …). The colour should change
>     gradually rather than jump to a new colour at each data point.
>     - modify the width of the line. This should also be interpolated
>     between data points to achieve a nice visual effect.
>
>     My best guess at the moment would be to use the radar3.ncl example
>     from this page: https://www.ncl.ucar.edu/Applications/radar.shtml
>     <https://www.ncl.ucar.edu/Applications/radar.shtml>.
>     I am confident that I could add data points and connect them with
>     lines, but I am not sure whether the three modifications I am
>     planning to do are possible when building my script on this example.
>
>     I would be grateful if someone could point me in the right direction.
>
>     Best regards,
>     Sebastian
>
>
>     _______________________________________________
>     ncl-talk mailing list
>     ncl-talk at ucar.edu <mailto:ncl-talk at ucar.edu>
>     List instructions, subscriber options, unsubscribe:
>     http://mailman.ucar.edu/mailman/listinfo/ncl-talk
>     <http://mailman.ucar.edu/mailman/listinfo/ncl-talk>
>
>
>
>
> -- 
> Adam Phillips
> Associate Scientist, Climate and Global Dynamics Laboratory, NCAR
> www.cgd.ucar.edu/staff/asphilli/ 
> <http://www.cgd.ucar.edu/staff/asphilli/> 303-497-1726
>
>
>
> _______________________________________________
> ncl-talk mailing list
> ncl-talk at ucar.edu
> List instructions, subscriber options, unsubscribe:
> http://mailman.ucar.edu/mailman/listinfo/ncl-talk

-- 
Dipl. Geophys. Karin Meier-Fleischer
Visualization, NCL, CDO
Application Support

Deutsches Klimarechenzentrum GmbH (DKRZ)
Bundesstrasse 45a - D20146 Hamburg - Germany

Phone:    +49 (0)40 460094 126
Fax:      +49 (0)40 460094 270
E-Mail:   meier-fleischer at dkrz.de
URL:      www.dkrz.de

Geschäftsführer: Prof. Dr. Thomas Ludwig
Sitz der Gesellschaft: Hamburg
Amtsgericht Hamburg HRB 39784

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mailman.ucar.edu/pipermail/ncl-talk/attachments/20170620/d031a254/attachment.html