Hi Michelle:
On Sep 23, 2012, at 3:38 PM, MichelleNCSU wrote: > On Fri, Sep 21, 2012 at 3:45 PM, David Winsemius [via R] > <ml-node+s789695n4643876...@n4.nabble.com> wrote: >> >> On Sep 21, 2012, at 7:17 AM, MichelleNCSU wrote: >> >>> Hello, >>> >>> First of all, let me apologize that my statistics background is modest at >>> best. >>> >>> I am doing some extreme value analysis on model output (WRF) which have >>> the >>> following dimensions: >>> >>> speed(time,lat,lon) >> >> How is this object structured? Are there multiple time layers where speed is >> measured at lat-lon points are successive times? > > The object is over space and time. It is model output from the > atmospheric science modeling tool WRF > (http://www.mmm.ucar.edu/wrf/users/) > > The data is constructed in 3-dimensions where the wind speed has the > dimensions (time, lat lat). > There are 67 times with 106 and 193 points lat and lon at each time. > This is why I was trying to index it to ensure I am able to perform > the task at each grid point. > You never mentioned how the data was read into R nor the exact present structure. The output from something like: str(speed) would help, as well as the code you used to input the data. -Roy ********************** "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 1352 Lighthouse Avenue Pacific Grove, CA 93950-2097 e-mail: roy.mendelss...@noaa.gov (Note new e-mail address) voice: (831)-648-9029 fax: (831)-648-8440 www: http://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 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.
