<div dir="ltr"><div>Hi,<br><br></div>One thing that comes to mind is to simply normalize your vector data prior to plotting. You would then use the vcRefLengthF resource to control how big the vectors are in the plot. There are plenty of examples on the examples page, a basic one being veceff_1.ncl.<br><pre><a href="http://ncl.ucar.edu/Applications/veceff.shtml">http://ncl.ucar.edu/Applications/veceff.shtml</a><br><a href="http://ncl.ucar.edu/Document/Graphics/Resources/vc.shtml">http://ncl.ucar.edu/Document/Graphics/Resources/vc.shtml</a><br><br><br></pre><pre><font face="arial,helvetica,sans-serif">I don't know about the Sea Level plot -- perhaps someone else can comment on that.<br><br></font></pre><pre><font face="arial,helvetica,sans-serif">Rick<br><br></font></pre></div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Jun 26, 2015 at 7:41 AM, KO Chiam <span dir="ltr"><<a href="mailto:kochiam@gmail.com" target="_blank">kochiam@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div class="gmail_default" style="font-family:verdana,sans-serif"><div class="gmail_default" style="font-size:12.8000001907349px">Dear Sir/Mdm,</div><div class="gmail_default" style="font-size:12.8000001907349px"><br></div><div class="gmail_default" style="font-size:12.8000001907349px">I am new to NCL and would appreciate if you can help address the following queries. Please pardon me if they sounds too simple.</div><div class="gmail_default" style="font-size:12.8000001907349px"><br></div><div class="gmail_default" style="font-size:12.8000001907349px">I would like to plot vectors (basically wind data) using arrows but I would like the arrows to be of equal length, in other words, I am only interested in the direction but not the magnitude. May I know if there is a way to do this?</div><div class="gmail_default" style="font-size:12.8000001907349px"><br></div><div class="gmail_default" style="font-size:12.8000001907349px">Also, is there already a function call to identify and plot the high and low pressure of a mean sea level chart?</div><div class="gmail_default" style="font-size:12.8000001907349px"><br></div><div class="gmail_default" style="font-size:12.8000001907349px">The version of NCL I am using is v6.3.0.</div><div class="gmail_default" style="font-size:12.8000001907349px"><br></div><div class="gmail_default" style="font-size:12.8000001907349px">Thank you very much for your time and help.</div><div class="gmail_default" style="font-size:12.8000001907349px"><br></div><div class="gmail_default" style="font-size:12.8000001907349px">Best Regards,</div><div class="gmail_default" style="font-size:12.8000001907349px">Keng-Oon</div></div></div>
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