R help - Jan 2015 - Reading *.nc4 data

Dear all,

i get the following error when reading *.nc4 data:

Error in R_nc_open: No such file or directoryError in
open.ncdf("D:/Ag/rst_1980_prate.nc4") :
  Error in open.ncdf trying to open file D:/Ag/rst_1980_prate.nc4


library("ncdf")
prec <- open.ncdf("D:/Ag/rst_1980_prate.nc4")
lons <- get.var.ncdf(prec,"lon")
lats <- get.var.ncdf(prec,"lat")
time <- get.var.ncdf(prec,"time")

What could be the problem

thanks for your help
-- 
John

	[[alternative HTML version deleted]]

The message seems to be clear in that either the directory or file is not
where you think it is.  Use 'choose.files()' to navigate to the file and
see what it prints out as the location.


Jim Holtman
Data Munger Guru

What is the problem that you are trying to solve?
Tell me what you want to do, not how you want to do it.

On Mon, Jan 26, 2015 at 1:59 PM, John Wasige <johnwasige at gmail.com>
wrote:
> Dear all,
>
> i get the following error when reading *.nc4 data:
>
> Error in R_nc_open: No such file or directoryError in
> open.ncdf("D:/Ag/rst_1980_prate.nc4") :
>   Error in open.ncdf trying to open file D:/Ag/rst_1980_prate.nc4
>
>
> library("ncdf")
> prec <- open.ncdf("D:/Ag/rst_1980_prate.nc4")
> lons <- get.var.ncdf(prec,"lon")
> lats <- get.var.ncdf(prec,"lat")
> time <- get.var.ncdf(prec,"time")
>
> What could be the problem
>
> thanks for your help
> --
> John
>
>         [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at 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]]

I don?t think the ncdf library open netcdf4 files, which your file would seem to
be.  You need the library ncdf4 for that.  For variety of reasons perhaps others
can explain, ncdf4 for Windows is not on CRAN.  You can download it from:

http://cirrus.ucsd.edu/~pierce/ncdf

-Roy

On Jan 26, 2015, at 10:59 AM, John Wasige <johnwasige at gmail.com> wrote:
> Dear all,
> 
> i get the following error when reading *.nc4 data:
> 
> Error in R_nc_open: No such file or directoryError in
> open.ncdf("D:/Ag/rst_1980_prate.nc4") :
>  Error in open.ncdf trying to open file D:/Ag/rst_1980_prate.nc4
> 
> 
> library("ncdf")
> prec <- open.ncdf("D:/Ag/rst_1980_prate.nc4")
> lons <- get.var.ncdf(prec,"lon")
> lats <- get.var.ncdf(prec,"lat")
> time <- get.var.ncdf(prec,"time")
> 
> What could be the problem
> 
> thanks for your help
> -- 
> John
> 
> 	[[alternative HTML version deleted]]
> 
> ______________________________________________
> R-help at 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 address and phone***
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Phone: (831)-420-3666
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e-mail: Roy.Mendelssohn at noaa.gov www: http://www.pfeg.noaa.gov/

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