Hi Philip: Results look correct to me. This might help you:
https://www.cpc.ncep.noaa.gov/products/wesley/wgrib2/default_inv.html -Roy > On Jul 6, 2020, at 9:29 AM, Philip <herd_...@cox.net> wrote: > > I am trying to access National Weather Service forecasting data through the > rNOMADS package. I’m not sure if the Weather Service software – grib2 – > loaded correctly. Second, some of the examples in the rNOMADS documentation > seem to run correctly but I’m not sure what the output means. Any anvise > would be greatly appreciated. > > 1 - I tried to load the wgrib2 software from instructions in the following > website: > > > https://bovineaerospace.wordpress.com/2015/04/26/how-to-install-rnomads-with-grib-file-support-on-windows/ > > 2 – the instructions say that if it loaded correctly I should get a laundry > list similar to what is below from the command: >system(“wgrib2”). > > > > The list I get looks different. Below is the first 20 or so entries. How > can I check to see if the wgrib2 loaded correctly? > > wgrib2 v0.1.9.9 9/2013 Wesley Ebisuzaki, Reinoud Bokhorst, Jaakko Hyvätti, > Dusan Jovic, Kristian Nilssen, Karl Pfeiffer, Pablo Romero, Manfred Schwarb, > Arlindo da Silva, Niklas Sondell, Sergey Varlamov > -0xSec inv X Hex dump of section X (0..8) > -MM inv reference time MM > -N_ens inv number of ensemble members > -RT inv type of reference Time > -S inv simple inventory with minutes and seconds > (subject to change) > -Sec0 inv contents of section0 > -Sec3 inv contents of section 3 (Grid Definition Section) > -Sec4 inv Sec 4 values (Product definition section) > -Sec5 inv Sec 5 values (Data representation section) > -Sec6 inv show bit-map section > -Sec_len inv length of various grib sections > -T inv reference time YYYYMMDDHHMMSS > -V inv diagnostic output > -VT inv verf time = reference_time + forecast_time > (YYYYMMDDHHMMSS) > -YY inv reference time YYYY > > 3 – As I said, some of the documentation examples work and for some I get > error messages. Below is an example of one that seemed to work but I don’t > understand the output. > > #GribInfo - page 20 > urlsOut <- CrawlModels(abbrev="gfs_0p50",depth=2) > ModelParameters <- ParseModelPage(urlsOut[2])#[1] is most recent model > MyPred <- ModelParameters$pred[grep("06$",ModelParameters$pred)] > Levels <- c("2_m_above_ground","800_mb") > Variables <- c("TMP","RH") > GribInfo <- GribGrab(urlsOut[2],MyPred,Levels,Variables) > GribInv <- GribInfo(GribInfo[[1]]$file.name,"grib2") > > The command GribInv$inventory returns: > > $inventory > [1] "1:0:d=2020070606:TMP:800 mb:6 hour fcst:" > "2:148450:d=2020070606:RH:800 mb:6 hour fcst:" > [3] "3:414132:d=2020070606:TMP:2 m above ground:6 hour fcst:" > "4:571266:d=2020070606:RH:2 m above ground:6 hour fcst:" > > This is supposed to be temperature and relative humidity 2 meters above the > ground and at 800 milibars for 2020 – July 6 – at ZULU time 0600. But I have > no idea what the numbers 414132 – second line – mean. > > Any advise would be greatly appreciated. > > Philip Heinrich > > From: stephen sefick > Sent: Thursday, July 2, 2020 3:20 PM > To: Philip > Cc: r-help > Subject: Re: [R] National Weather Service Data > > I am unfamiliar with Rnomads. Could you provide a minimal reproducable > example? You are more likely to receive help this way. > > > On Thu, Jul 2, 2020, 18:06 Philip <herd_...@cox.net> wrote: > > Is anyone out there familiar with rNOMADS? It is a package to get into > National Weather Service forecasting data with R? > > I'm not sure the Weather Service software named wgrib2 loaded correctly > because some of the stuff won't run and I can't make much sense out of some > of the output. > > Thanks. > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. ********************** "The contents of this message do not reflect any position of the U.S. Government or NOAA." ********************** Roy Mendelssohn Supervisory Operations Research Analyst NOAA/NMFS Environmental Research Division Southwest Fisheries Science Center ***Note new street address*** 110 McAllister Way Santa Cruz, CA 95060 Phone: (831)-420-3666 Fax: (831) 420-3980 e-mail: roy.mendelss...@noaa.gov www: https://www.pfeg.noaa.gov/ "Old age and treachery will overcome youth and skill." "From those who have been given much, much will be expected" "the arc of the moral universe is long, but it bends toward justice" -MLK Jr. ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
