<div dir="ltr">Hi Sebastian,<div>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. </div><div><br></div><div>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. </div><div><br></div><div>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.</div><div>Adam </div></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Jun 12, 2017 at 6:44 AM, Milinski, Sebastian <span dir="ltr"><<a href="mailto:sebastian.milinski@mpimet.mpg.de" target="_blank">sebastian.milinski@mpimet.mpg.de</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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Dear All,
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<div>I would like to produce a plot in a similar style as the well-known temperature or sea ice spiral plots (e.g. <a href="http://www.climate-lab-book.ac.uk/spirals/" target="_blank">http://www.climate-lab-<wbr>book.ac.uk/spirals/</a>).</div>
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<div>The angle should represent the month (1-12) and the distance from the centre some value.</div>
<div>The data points for consecutive months should be connected by a line.</div>
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<div>Has someone tried this in NCL already? What would the best approach be?</div>
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<div>I would also like to modify the line a bit:</div>
<div>- interpolate between data points rather than drawing a straight line</div>
<div>- 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.</div>
<div>- modify the width of the line. This should also be interpolated between data points to achieve a nice visual effect.</div>
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<div>My best guess at the moment would be to use the radar3.ncl example from this page: <a href="https://www.ncl.ucar.edu/Applications/radar.shtml" target="_blank">https://www.ncl.ucar.<wbr>edu/Applications/radar.shtml</a>.</div>
<div>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.</div>
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<div>I would be grateful if someone could point me in the right direction.</div>
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<div>Best regards,</div>
<div>Sebastian</div>
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<br></blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div><div><span><font color="#888888">Adam Phillips <br></font></span></div><span><font color="#888888">Associate Scientist, </font></span><span><font color="#888888">Climate and Global Dynamics Laboratory, NCAR<br></font></span></div></div><div><span><font color="#888888"><a href="http://www.cgd.ucar.edu/staff/asphilli/" target="_blank">www.cgd.ucar.edu/staff/asphilli/</a> </font></span><span><font color="#888888">303-497-1726 </font></span></div><span><font color="#888888"></font></span><div><div><span><font color="#888888"><br></font></span><div><span><font color="#888888"><a href="http://www.cgd.ucar.edu/staff/asphilli" target="_blank"></a></font></span></div></div></div></div></div></div></div></div></div></div></div>
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