<div dir="ltr"><div class="gmail_default" style="font-family:verdana,sans-serif">Dear Sirs,</div><div class="gmail_default" style="font-family:verdana,sans-serif"><br></div><div class="gmail_default" style="font-family:verdana,sans-serif">Thank you very much for all the help. It really helps me a lot.</div><div class="gmail_default" style="font-family:verdana,sans-serif">Thank you.</div><div class="gmail_default" style="font-family:verdana,sans-serif"><br></div><div class="gmail_default" style="font-family:verdana,sans-serif">Best Regards,</div><div class="gmail_default" style="font-family:verdana,sans-serif">Keng-Oon</div></div><div class="gmail_extra"><br><div class="gmail_quote">On 27 June 2015 at 05:05, David Brown <span dir="ltr"><<a href="mailto:dbrown@ucar.edu" target="_blank">dbrown@ucar.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Actually, there is a very simple way to equalize the length of the<br>
vectors with no need to modify the data.<br>
There is a resource called vcMinFracLengthF that specifies the length<br>
of the minimum magnitude vector as a fraction of the maximum magnitude<br>
vector. Setting it to 1.0 will make all the vectors the same length.<br>
-dave<br>
<div class="HOEnZb"><div class="h5"><br>
On Fri, Jun 26, 2015 at 10:48 AM, Adam Phillips <<a href="mailto:asphilli@ucar.edu">asphilli@ucar.edu</a>> wrote:<br>
> Hi Keng-Oon,<br>
> For the high and low labels: See examples 1 and 2 from the satellite<br>
> applications page here:<br>
> <a href="http://www.ncl.ucar.edu/Applications/satel.shtml#ex2" rel="noreferrer" target="_blank">http://www.ncl.ucar.edu/Applications/satel.shtml#ex2</a><br>
><br>
> There are a whole suite of cnHigh* and cnLow* resources.<br>
><br>
> If you are interested in identifying local highs and lows you can use the<br>
> local_min and local_max functions:<br>
> <a href="http://www.ncl.ucar.edu/Document/Functions/Built-in/local_max.shtml" rel="noreferrer" target="_blank">http://www.ncl.ucar.edu/Document/Functions/Built-in/local_max.shtml</a><br>
> <a href="http://www.ncl.ucar.edu/Document/Functions/Built-in/local_min.shtml" rel="noreferrer" target="_blank">http://www.ncl.ucar.edu/Document/Functions/Built-in/local_min.shtml</a><br>
><br>
> Adam<br>
><br>
><br>
> On Fri, Jun 26, 2015 at 10:38 AM, Rick Brownrigg <<a href="mailto:brownrig@ucar.edu">brownrig@ucar.edu</a>> wrote:<br>
>><br>
>> Hi,<br>
>><br>
>> One thing that comes to mind is to simply normalize your vector data prior<br>
>> to plotting. You would then use the vcRefLengthF resource to control how big<br>
>> the vectors are in the plot. There are plenty of examples on the examples<br>
>> page, a basic one being veceff_1.ncl.<br>
>><br>
>> <a href="http://ncl.ucar.edu/Applications/veceff.shtml" rel="noreferrer" target="_blank">http://ncl.ucar.edu/Applications/veceff.shtml</a><br>
>> <a href="http://ncl.ucar.edu/Document/Graphics/Resources/vc.shtml" rel="noreferrer" target="_blank">http://ncl.ucar.edu/Document/Graphics/Resources/vc.shtml</a><br>
>><br>
>><br>
>> I don't know about the Sea Level plot -- perhaps someone else can comment<br>
>> on that.<br>
>><br>
>> Rick<br>
>><br>
>><br>
>> On Fri, Jun 26, 2015 at 7:41 AM, KO Chiam <<a href="mailto:kochiam@gmail.com">kochiam@gmail.com</a>> wrote:<br>
>>><br>
>>> Dear Sir/Mdm,<br>
>>><br>
>>> I am new to NCL and would appreciate if you can help address the<br>
>>> following queries. Please pardon me if they sounds too simple.<br>
>>><br>
>>> I would like to plot vectors (basically wind data) using arrows but I<br>
>>> would like the arrows to be of equal length, in other words, I am only<br>
>>> interested in the direction but not the magnitude. May I know if there is a<br>
>>> way to do this?<br>
>>><br>
>>> Also, is there already a function call to identify and plot the high and<br>
>>> low pressure of a mean sea level chart?<br>
>>><br>
>>> The version of NCL I am using is v6.3.0.<br>
>>><br>
>>> Thank you very much for your time and help.<br>
>>><br>
>>> Best Regards,<br>
>>> Keng-Oon<br>
>>><br>
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>>><br>
>><br>
>><br>
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>><br>
><br>
><br>
><br>
> --<br>
> Adam Phillips<br>
> Associate Scientist, Climate and Global Dynamics Laboratory, NCAR<br>
> <a href="http://www.cgd.ucar.edu/staff/asphilli/" rel="noreferrer" target="_blank">www.cgd.ucar.edu/staff/asphilli/</a> <a href="tel:303-497-1726" value="+13034971726">303-497-1726</a><br>
><br>
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</div></div></blockquote></div><br></div>