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Jeff/Jonathan,<br>
<br>
The rendering of vectors is done by specifying the two components:
magnitude and direction, or horizontal and vertical components. In
your original script you have:<br>
<br>
'd skip(c,6,3);skip(u,6,3)'<br>
<br>
I believe this will use the variable "c" as the horizontal component
of the vector and "u" as the vertical. In your case the horizontal
is latitude and vertical is altitude. In other words I don't think
your original script is plotting vertical motion. Ditto the
suggestion for 'd W;0*W', which I think will give you vertical
velocity plotted as horizontal vectors. Instead I think you want 'd
0*W;W' (or 'd c*0;c').<br>
<br>
Jim<br>
<br>
<div class="moz-cite-prefix">On 9/15/14 8:53 AM, Jeff Duda wrote:<br>
</div>
<blockquote
cite="mid:CAAig09COALL+SWsCa+02KZF7RNj4vYz78KcCtvb_OjE0nBvNGA@mail.gmail.com"
type="cite">
<div dir="ltr">
<div>
<div>
<div>Jonathan,<br>
Oh, I see what you're saying. Yes, it appears the vectors
in your figure accurately depict the vertical motion.<br>
<br>
</div>
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 <br>
</div>
'd W;0*W'<br>
<br>
</div>
Jeff<br>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Mon, Sep 15, 2014 at 1:35 PM,
Jonathan Wynn Smith <span dir="ltr"><<a
moz-do-not-send="true" href="mailto:jwsmith9@gmail.com"
target="_blank">jwsmith9@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>
<div>
<div>
<div>
<div>
<div>Are you saying the vectors that I have in
the figure accurately depict the vertical
motion?<br>
<br>
I do not want to display 3-d variables. Just
the vertical motion vector: W.<br>
<br>
Unless I have some procedure wrong, the
vectors in the figure will not display with
just W.<br>
<br>
</div>
For example:<br>
<br>
</div>
cannot use<br>
d W<br>
<br>
</div>
must use<br>
</div>
d W,U or d W,V<br>
<br>
</div>
for vectors to display. Why is this?<span
class="HOEnZb"><font color="#888888"><br>
<br>
</font></span></div>
<span class="HOEnZb"><font color="#888888">Jonathan</font></span></div>
<div class="HOEnZb">
<div class="h5">
<div class="gmail_extra"><br>
<div class="gmail_quote">On Mon, Sep 15, 2014 at 1:43
PM, Jeff Duda <span dir="ltr"><<a
moz-do-not-send="true"
href="mailto:jeffduda319@gmail.com"
target="_blank">jeffduda319@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>Jonathan,<br>
</div>
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.<br>
<br>
Please clarify the problem.<br>
<br>
Jeff Duda<br>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">
<div>
<div>On Mon, Sep 15, 2014 at 12:33 PM,
Jonathan Wynn Smith <span dir="ltr"><<a
moz-do-not-send="true"
href="mailto:jwsmith9@gmail.com"
target="_blank">jwsmith9@gmail.com</a>></span>
wrote:<br>
</div>
</div>
<blockquote class="gmail_quote"
style="margin:0 0 0 .8ex;border-left:1px
#ccc solid;padding-left:1ex">
<div>
<div>
<div dir="ltr">
<div>Good afternoon:<br>
<br>
'a = ave(U.1,t=289,t=1008,1)*100'<br>
'b = ave(V.1,t=289,t=1008,1)*100'<br>
<br>
'c = ave(W.1,t=289, t=1008)*100'<br>
"xcbar 1 10 0.3 0.5 -fw 0.175 -fh
0.175 -line on"<br>
<br>
<br>
"set gxout vector"<br>
'd skip(c,6,3);skip(u,6,3)'<br>
<br>
<br>
</div>
<div>Above, GrADS is displaying a
north-south transect of carbon
monoxide with vertical motion
vectors.<br>
<br>
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?<br>
<br>
</div>
<div>Is it possible to print out the W
vectors without the U or V
components?<br>
<br>
</div>
<div>I have attached a figure of what
I am referring to.<br>
</div>
<div><br>
</div>
<div>Thanks<span><font color="#888888"><br>
Jonathan<br>
</font></span></div>
<span><font color="#888888">
<div>
<div>
<div><br>
-- <br>
<div dir="ltr"><span
style="color:rgb(0,0,255)"><font><b>Jonathan
Wynn Smith, Ph.D.</b></font></span><br>
<font size="1"><a
moz-do-not-send="true"
href="mailto:jonathan.smith@noaa.gov" target="_blank">jonathan.smith@noaa.gov</a><br>
<a
moz-do-not-send="true"
href="tel:301-683-0500" value="+13016830500" target="_blank">301-683-0500</a><br>
Postdoctoral Research
Associate <br>
National Academy of
Science/National
Research Council
Associateship<br>
NOAA/NESDIS/STAR/SMCD,
#2844<br>
5830 University Research
Ct.<br>
College Park, MD
20740-3818</font><br>
<font size="1"><i><br>
Lord, you establish
peace for us; all that
we have accomplished
you have <br>
done for us. - Isaiah
26:12</i></font><br>
<br>
<br>
<br>
<br>
<br>
<br>
</div>
</div>
</div>
</div>
</font></span></div>
<br>
</div>
</div>
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<span><font color="#888888"><br>
<br clear="all">
<br>
-- <br>
Jeff Duda<br>
Graduate research assistant<br>
University of Oklahoma School of Meteorology<br>
Center for Analysis and Prediction of Storms<br>
</font></span></div>
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<br>
<br clear="all">
<br>
-- <br>
<div dir="ltr"><span style="color:rgb(0,0,255)"><font><b>Jonathan
Wynn Smith, Ph.D.</b></font></span><br>
<font size="1"><a moz-do-not-send="true"
href="mailto:jonathan.smith@noaa.gov"
target="_blank">jonathan.smith@noaa.gov</a><br>
301-683-0500<br>
Postdoctoral Research Associate <br>
National Academy of Science/National Research
Council Associateship<br>
NOAA/NESDIS/STAR/SMCD, #2844<br>
5830 University Research Ct.<br>
College Park, MD 20740-3818</font><br>
<font size="1"><i><br>
Lord, you establish peace for us; all that we
have accomplished you have <br>
done for us. - Isaiah 26:12</i></font><br>
<br>
<br>
<br>
<br>
<br>
<br>
</div>
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</div>
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<br>
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</div>
<br>
<br clear="all">
<br>
-- <br>
Jeff Duda<br>
Graduate research assistant<br>
University of Oklahoma School of Meteorology<br>
Center for Analysis and Prediction of Storms<br>
</div>
<br>
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