<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>
<body>
<p>All,</p>
<p> Thanks for your responses! I couldn't get skip() to work
properly (it left gaps in the images) but lterp() worked great and
I was able to cut the rendering time by about 85% by plotting at
1/4 the original resolution!<br>
</p>
<p>Cheers,</p>
<p>Bob<br>
</p>
<div class="moz-cite-prefix">On 12/15/2020 12:56 PM, Adams, Jennifer
M. (GSFC-610.2)[ADNET SYSTEMS INC] wrote:<br>
</div>
<blockquote type="cite"
cite="mid:E59E51E3-4DA4-4C83-B9B9-461ADFCF494C@nasa.gov">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta name="Generator" content="Microsoft Word 15 (filtered
medium)">
<style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
span.EmailStyle18
{mso-style-type:personal-reply;
font-family:"Calibri",sans-serif;
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}</style>
<div class="WordSection1">
<div>
<p class="MsoNormal">Jeff wrote:<o:p></o:p></p>
</div>
<div>
<div>
<p class="MsoNormal"><i>>>You can write a control file
and adjust the nx and ny values in the XDEF and YDEF
lines
<o:p></o:p></i></p>
<p class="MsoNormal"><i>>> so that GrADS attempts to
plot your fields on a coarser grid.
<o:p></o:p></i></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">This will only work if the grid is not
rectilinear and you are using PDEF, where the XDEF/YDEF
entries describe the destination grid for the pdef
interpolation. Otherwise, the XDEF and YDEF entries must
match the native grid.
<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">The lterp() and skip() functions will
work, but I suggest using ‘define’ to copy the original
grid into memory first. This will mean you do the file I/O
only once, and will speed up any function you apply to the
original grid.
<o:p></o:p></p>
<p class="MsoNormal">--Jennifer<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<div>
<p class="MsoNormal">On Tue, Dec 15, 2020 at 7:36 AM Robert
Kuligowski <<a href="mailto:bob.kuligowski@noaa.gov"
moz-do-not-send="true">bob.kuligowski@noaa.gov</a>>
wrote:<o:p></o:p></p>
</div>
<blockquote style="border:none;border-left:solid #CCCCCC
1.0pt;padding:0in 0in 0in
6.0pt;margin-left:4.8pt;margin-right:0in">
<p class="MsoNormal">All,<br>
<br>
I have some netCDF files with 6501 lines and 18,000
columns that <br>
I'm plotting in GrADS, and creating the .png output files
is taking a <br>
long time. I clearly don't need that much detail in the
actual image, <br>
so is there a simple way to sample or aggregate the data
in GrADS before <br>
plotting in order to make it render more quickly? I
looked through the <br>
documentation but wasn't able to find the droids I'm
looking for. Thanks!<br>
<br>
Cheers,<br>
<br>
-- <br>
Bob Kuligowski, Ph.D.<br>
Meteorologist<br>
NOAA/NESDIS/Center for Satellite Applications and Research
(STAR)<br>
<br>
Mailing Address:<br>
National Oceanic and Atmospheric Administration<br>
NESDIS STAR/SMCD<br>
Bob Kuligowski<br>
NCWCP E/RA2<br>
5830 University Research Court<br>
2nd Floor, Office #2828<br>
College Park, MD 20740-3818<br>
<br>
Phone: (301) 683-3593<br>
Fax : (301) 683-3616<br>
<br>
<a
href="https://gcc02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.star.nesdis.noaa.gov%2Fstar%2FKuligowski_B.php&data=04%7C01%7Cjennifer.m.adams%40nasa.gov%7C315c22bfb3f344b97bba08d8a11df848%7C7005d45845be48ae8140d43da96dd17b%7C0%7C0%7C637436497384567088%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=XneMEb94S96wGtuJ79Z5RxGIN1rsamcavKZ82GT4S0I%3D&reserved=0"
target="_blank" moz-do-not-send="true">http://www.star.nesdis.noaa.gov/star/Kuligowski_B.php</a><br>
<a
href="https://gcc02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.star.nesdis.noaa.gov%2Fsmcd%2Femb%2Fff%2Findex.php&data=04%7C01%7Cjennifer.m.adams%40nasa.gov%7C315c22bfb3f344b97bba08d8a11df848%7C7005d45845be48ae8140d43da96dd17b%7C0%7C0%7C637436497384567088%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=TJCSlpV34%2BC%2Fxg3IHH9WB1MqgT3vKOmi47u27r4ccSA%3D&reserved=0"
target="_blank" moz-do-not-send="true">http://www.star.nesdis.noaa.gov/smcd/emb/ff/index.php</a><br>
<br>
_______________________________________________<br>
gradsusr mailing list<br>
<a href="mailto:gradsusr@gradsusr.org" target="_blank"
moz-do-not-send="true">gradsusr@gradsusr.org</a><br>
<a
href="https://gcc02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fgradsusr.org%2Fmailman%2Flistinfo%2Fgradsusr&data=04%7C01%7Cjennifer.m.adams%40nasa.gov%7C315c22bfb3f344b97bba08d8a11df848%7C7005d45845be48ae8140d43da96dd17b%7C0%7C0%7C637436497384577049%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=c94Glc9YJ3gAT4WZMUQn%2BhRewczA4H8hj0nqzbv1dd4%3D&reserved=0"
target="_blank" moz-do-not-send="true">http://gradsusr.org/mailman/listinfo/gradsusr</a><o:p></o:p></p>
</blockquote>
</div>
<p class="MsoNormal"><br clear="all">
<br>
-- <o:p></o:p></p>
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<p class="MsoNormal"><span
style="font-size:10.0pt">Jeff Duda,
Research Scientist</span><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">University of Colorado
Boulder<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">Cooperative Institute
for Research in Environmental Sciences<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">NOAA/OAR/ESRL/Global
Systems Laboratory<br>
<span style="font-size:10.0pt">Boulder, CO</span><o:p></o:p></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<pre class="moz-quote-pre" wrap="">_______________________________________________
gradsusr mailing list
<a class="moz-txt-link-abbreviated" href="mailto:gradsusr@gradsusr.org">gradsusr@gradsusr.org</a>
<a class="moz-txt-link-freetext" href="http://gradsusr.org/mailman/listinfo/gradsusr">http://gradsusr.org/mailman/listinfo/gradsusr</a>
</pre>
</blockquote>
<pre class="moz-signature" cols="72">--
Bob Kuligowski, Ph.D.
Meteorologist
NOAA/NESDIS/Center for Satellite Applications and Research (STAR)
Mailing Address:
National Oceanic and Atmospheric Administration
NESDIS STAR/SMCD
Bob Kuligowski
NCWCP E/RA2
5830 University Research Court
2nd Floor, Office #2828
College Park, MD 20740-3818
Phone: (301) 683-3593
Fax : (301) 683-3616
<a class="moz-txt-link-freetext" href="http://www.star.nesdis.noaa.gov/star/Kuligowski_B.php">http://www.star.nesdis.noaa.gov/star/Kuligowski_B.php</a>
<a class="moz-txt-link-freetext" href="http://www.star.nesdis.noaa.gov/smcd/emb/ff/index.php">http://www.star.nesdis.noaa.gov/smcd/emb/ff/index.php</a>
</pre>
</body>
</html>