[gradsusr] W vector on north-south transect

[Jeff Duda]

Jonathan,
Oh, I see what you're saying.  Yes, it appears the vectors in your figure
accurately depict the vertical motion.

To display vectors, you must use the field1;field2 syntax.  But you can
manipulate one of the fields to display 1-D vectors.  Just make one of the
fields a zero field.  For example, you could display the vertical motion
alone using
'd W;0*W'

Jeff

On Mon, Sep 15, 2014 at 1:35 PM, Jonathan Wynn Smith <jwsmith9 at gmail.com>
wrote:

> Are you saying the vectors that I have in the figure accurately depict the
> vertical motion?
>
> I do not want to display 3-d variables.  Just the vertical motion vector:
> W.
>
> Unless I have some procedure wrong, the vectors in the figure will not
> display with just W.
>
> For example:
>
> cannot use
> d W
>
> must use
> d W,U or d W,V
>
> for vectors to display.  Why is this?
>
> Jonathan
>
> On Mon, Sep 15, 2014 at 1:43 PM, Jeff Duda <jeffduda319 at gmail.com> wrote:
>
>> Jonathan,
>> I'm not sure I understand the difficulty you are facing.  GrADS cannot
>> display three-dimensional vectors, so if you want to visualize all three
>> components to the wind, one of them will have to be displayed as contours
>> rather than as vectors.  The plot you attached makes sense if you want to
>> look at advection of carbon monoxide along a north-south vertical cross
>> section.
>>
>> Please clarify the problem.
>>
>> Jeff Duda
>>
>> On Mon, Sep 15, 2014 at 12:33 PM, Jonathan Wynn Smith <jwsmith9 at gmail.com
>> > wrote:
>>
>>> Good afternoon:
>>>
>>> 'a = ave(U.1,t=289,t=1008,1)*100'
>>> 'b = ave(V.1,t=289,t=1008,1)*100'
>>>
>>> 'c = ave(W.1,t=289, t=1008)*100'
>>> "xcbar 1 10 0.3 0.5 -fw 0.175 -fh 0.175 -line on"
>>>
>>>
>>> "set gxout vector"
>>> 'd skip(c,6,3);skip(u,6,3)'
>>>
>>>
>>> Above, GrADS is displaying a north-south transect of carbon monoxide
>>> with vertical motion vectors.
>>>
>>> The W variable will not display vectors by itself. I actually will
>>> display W contours but I need vectors. It seems that there has to be one of
>>> the horizontal variables displayed in conjunction W for vectors to
>>> display.  I chose U in the above case.  Does this mean the U component of
>>> the vertical wind?
>>>
>>> Is it possible to print out the W vectors without the U or V components?
>>>
>>> I have attached a figure of what I am referring to.
>>>
>>> Thanks
>>> Jonathan
>>>
>>> --
>>> *Jonathan Wynn Smith, Ph.D.*
>>> jonathan.smith at noaa.gov
>>> 301-683-0500
>>> Postdoctoral Research Associate
>>> National Academy of Science/National Research Council Associateship
>>> NOAA/NESDIS/STAR/SMCD, #2844
>>> 5830 University Research Ct.
>>> College Park, MD 20740-3818
>>>
>>>
>>> *Lord, you establish peace for us; all that we have accomplished you
>>> have done for us. - Isaiah 26:12*
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> _______________________________________________
>>> gradsusr mailing list
>>> gradsusr at gradsusr.org
>>> http://gradsusr.org/mailman/listinfo/gradsusr
>>>
>>>
>>
>>
>> --
>> Jeff Duda
>> Graduate research assistant
>> University of Oklahoma School of Meteorology
>> Center for Analysis and Prediction of Storms
>>
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>>
>>
>
>
> --
> *Jonathan Wynn Smith, Ph.D.*
> jonathan.smith at noaa.gov
> 301-683-0500
> Postdoctoral Research Associate
> National Academy of Science/National Research Council Associateship
> NOAA/NESDIS/STAR/SMCD, #2844
> 5830 University Research Ct.
> College Park, MD 20740-3818
>
>
> *Lord, you establish peace for us; all that we have accomplished you have
> done for us. - Isaiah 26:12*
>
>
>
>
>
>
>
> _______________________________________________
> gradsusr mailing list
> gradsusr at gradsusr.org
> http://gradsusr.org/mailman/listinfo/gradsusr
>
>


-- 
Jeff Duda
Graduate research assistant
University of Oklahoma School of Meteorology
Center for Analysis and Prediction of Storms
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