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<p>Hello</p>
<p>Thank you so much. I will give it a try</p>
<p>Best<br>
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<div id="x_divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Latham, Robert J. <robl@mcs.anl.gov><br>
<b>Sent:</b> Friday, August 13, 2021 1:58:51 AM<br>
<b>To:</b> parallel-netcdf@lists.mcs.anl.gov; Sadegh Dalfardi<br>
<b>Subject:</b> Re: question</font>
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<div class="PlainText">On Fri, 2021-08-13 at 12:04 +0000, Sadegh Dalfardi wrote:<br>
> Hello<br>
> Thanks for your answer.<br>
> I mean i have do downloaded precipitation data for 20 years in GES<br>
> DISK and for half hour time interval and space resolution of 0.1<br>
> degree in netcdf format. now I need them in for instance 6 hour time<br>
> interval and with resolution 1 km. How can i do it? please guide and<br>
> help me to do that if it is possible.<br>
<br>
Well, this is getting kind of off topic for a parallel-netcdf mailing<br>
list...<br>
<br>
It does sound like the NetCDF Operators (<a href="http://nco.sourceforge.net/">http://nco.sourceforge.net/</a>)<br>
are what you should apply here. If you are new to NCO, there is a<br>
lengthy user gudide <a href="http://nco.sourceforge.net/nco.html">http://nco.sourceforge.net/nco.html</a> (also available<br>
in PDF format)<br>
<br>
I have seen some pretty elaborate NCO workflows, extracting variables,<br>
averaging over time series, but I emphasise the "seen" part -- I do not<br>
have a lot of first hand experience with NCO myself.<br>
<br>
==rob<br>
<br>
<br>
> Best<br>
> Sadegh Dalfardi<br>
> From: Latham, Robert J. <robl@mcs.anl.gov><br>
> Sent: Thursday, August 12, 2021 3:13:14 AM<br>
> To: parallel-netcdf@lists.mcs.anl.gov; Sadegh Dalfardi<br>
> Subject: Re: question<br>
> <br>
> On Thu, 2021-08-12 at 12:35 +0000, Sadegh Dalfardi wrote:<br>
> > I have a netcdf file and want to change the spatial and temporal<br>
> > scale whithout changing and conversion to another format. I want to<br>
> > know is it possible? If so please help or guide me cause i am a<br>
> > beginner.<br>
> <br>
> I'm not 100% clear on what you're asking, so please follow up if I'm<br>
> missing the mark.<br>
> <br>
> A NetCDF dataset (which parallel-netcdf and Unidata NetCDF both can<br>
> read and write) is fairly rigid in its structure. If you have crated<br>
> a<br>
> few variables of a given dimension, the only way to change those<br>
> variables and dimensions is to re-create the dataset.<br>
> <br>
> There are tools such as the "netcdf operators" (NCO) which make such<br>
> manipulations easier, but if you have very large datasets it will<br>
> take<br>
> some time.<br>
> <br>
> If you have variables and you want them to grow over time then a<br>
> "record variable" might suit your needs. A typical use case would be<br>
> a<br>
> sensor array that is logging the environment. Maybe the variable has<br>
> dimenions for latitude and longidue for each sensor in the array and<br>
> a<br>
> third "UNLIMITED" dimension recoding the temperature every five<br>
> minutes.<br>
> <br>
> ==rob<br>
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