<div dir="ltr"><div><div><div><div>Dear Javier,<br><br></div>First of all, my apologies for taking so long to get back to you. I tried reading your file using the rNOMADS ReadGrib() function and it was not successful. Specifically, it took a very long time and never seemed to complete. I share your frustration with reading grib files in R (and in general). They are difficult.<br><br></div>rNOMADS is primarily concerned with interfacing with the NOMADS data portal on the NOAA web site. Unfortunately, I don't have the time or the resources to add support for grib files that do not conform to their standards. My recommendation is to see if this tool can be used to read grib time series:<br><a href="http://www.cpc.ncep.noaa.gov/products/wesley/wgrib2/">http://www.cpc.ncep.noaa.gov/products/wesley/wgrib2/</a><br><br></div>Regards,<br><br></div>Danny<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Aug 9, 2017 at 3:39 AM, Javier FLUIXA <span dir="ltr"><<a href="mailto:Javier.FLUIXA@crealp.vs.ch" target="_blank">Javier.FLUIXA@crealp.vs.ch</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<p class="MsoNormal"><span lang="EN-US">Dear developer of the rNOMADS package,<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-US">I am an engineer in a Swiss research center and I am currently working with the seasonal forecasts of the NOAA.<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-US">I’m using the R environment to read and manipulate the
<b><u>timeseries</u></b> files I have downloaded (e.g. those you can find here <a href="http://nomads.ncep.noaa.gov/pub/data/nccf/com/cfs/prod/cfs/cfs.20170808/06/time_grib_01/" target="_blank">
http://nomads.ncep.noaa.gov/<wbr>pub/data/nccf/com/cfs/prod/<wbr>cfs/cfs.20170808/06/time_grib_<wbr>01/</a>). I’ve tried to read them with the readGDAL function of the rgdal package. However, when I read them all the data is null because I don’t have the JPEG2000 driver.<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-US">So I decided to use the rNOMADS package. The problem is I cannot read directly the grb file I downloaded; I can only read those downloaded from specific links (extracted using NOMADSArchiveList() or NOMADSRealTimeList()
functions), which are in 6hrly_grib format (not very convenient for my purposes…).
<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-US">Is there a direct way of reading <b><u>already downloaded timeseries</u></b> grib files using the rNOMADS package?<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-US">Thank you very much for your help. Yours sincerely,<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US">Javier F.<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-US">PS: I include a link where you can download one of the grib2 files I’m working with:<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US"><a href="http://nomads.ncep.noaa.gov/pub/data/nccf/com/cfs/prod/cfs/cfs.20170808/06/time_grib_01/prate.01.2017080806.daily.grb2" target="_blank">http://nomads.ncep.noaa.gov/<wbr>pub/data/nccf/com/cfs/prod/<wbr>cfs/cfs.20170808/06/time_grib_<wbr>01/prate.01.2017080806.daily.<wbr>grb2</a><u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></span></p>
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<p class="MsoNormal" style="margin-bottom:3.0pt"><b><span style="font-size:10.0pt;font-family:"Arial Narrow","sans-serif";color:#4b1413" lang="EN-US">Javier FLUIXÁ SANMARTÍN</span></b><span style="font-size:10.0pt;font-family:"Arial Narrow","sans-serif";color:#4b1413" lang="EN-US">
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