r@i@1290 m@iii@g oii @im@com
2019-Mar-16 17:50 UTC
[R] Problems trying to make a time series using NetCDF file
Hi there,
I am using climate model data in attempt to create a time series for a specific
location. Getting longitude and latitude is fine. However, I am receiving the
following error when using the "ncvar_get" function in trying to
derive the "time" dimension:
Error in nc$dim[[idobj$list_index]] :
attempt to select more than one element in get1index <real>
What could be causing this?
-This is what I have done so far:
#CanESM2 plotting for specified
yearncfname<-"MaxPrecCCCMACanESM2rcp45.nc"
Prec<-raster(ncfname)
print(Prec)
Model<-nc_open(ncfname)longitude<-ncvar_get(Model, "lon") #Works
fine
latitude<-ncvar_get(Model, "lat") #Works fine
time<-ncvar_get(Model, "time") #Error in nc$dim[[idobj$list_index]]
: attempt to select more than one element in get1index <real>
Here is the structure of the file after using "nc_open":
File MaxPrecCCCMACanESM2rcp45.nc (NC_FORMAT_NETCDF4):
3 variables (excluding dimension variables):
double onedaymax[lon,lat,time] (Contiguous storage)
units: mm/day
double fivedaymax[lon,lat,time] (Contiguous storage)
units: mm/day
short Year[time] (Contiguous storage)
3 dimensions:
time Size:95
lat Size:64
units: degree North
lon Size:128
units: degree East
What could be causing this error??
Thanks in advance, and I look forward to your response!
[[alternative HTML version deleted]]
Jeff Newmiller
2019-Mar-17 01:33 UTC
[R] Problems trying to make a time series using NetCDF file
You might have better luck on the R-sig-spatial mailing list. If you had
provided a reproducible example ("reprex") then I might have tried to
answer the question but I don't use these tools often enough to grasp the
source of your problem based only on diagnostics. And even though they might
have a better chance of seeing the issue with only diagnostics, I am sure they
would appreciate a reprex too.
On March 16, 2019 10:50:46 AM PDT, rain1290--- via R-help <r-help at
r-project.org> wrote:>Hi there,
>I am using climate model data in attempt to create a time series for a
>specific location. Getting longitude and latitude is fine. However, I
>am receiving the following error when using the "ncvar_get"
function in
>trying to derive the "time" dimension:
>Error in nc$dim[[idobj$list_index]] :
> attempt to select more than one element in get1index <real>
>What could be causing this?
>-This is what I have done so far:
>#CanESM2 plotting for specified
>yearncfname<-"MaxPrecCCCMACanESM2rcp45.nc"
>Prec<-raster(ncfname)
>print(Prec)
>Model<-nc_open(ncfname)longitude<-ncvar_get(Model, "lon")
#Works fine
>latitude<-ncvar_get(Model, "lat") #Works fine
>time<-ncvar_get(Model, "time") #Error in
nc$dim[[idobj$list_index]] :
>attempt to select more than one element in get1index <real>
>
>
>Here is the structure of the file after using "nc_open":
>File MaxPrecCCCMACanESM2rcp45.nc (NC_FORMAT_NETCDF4):
>
> 3 variables (excluding dimension variables):
> double onedaymax[lon,lat,time] (Contiguous storage)
> units: mm/day
> double fivedaymax[lon,lat,time] (Contiguous storage)
> units: mm/day
> short Year[time] (Contiguous storage)
>
> 3 dimensions:
> time Size:95
> lat Size:64
> units: degree North
> lon Size:128
> units: degree East
>What could be causing this error??
>Thanks in advance, and I look forward to your response!
> [[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.
--
Sent from my phone. Please excuse my brevity.
David W. Pierce
2019-Mar-17 02:02 UTC
[R] Problems trying to make a time series using NetCDF file
Hi there, the reason it's doing this is because there is no variable named "time" in the file. Obviously I need to patch the ncdf4 package so that it issues an/ understandable error message in this case instead of dying with a weird R error message. That is probably happening because there is a dimension named "time", but no variable name "time". Perhaps what you meant to do instead is get the "Year" variable, which is, indeed, a variable in the file: Year <- ncvar_get( Model, "Year" ) Regards, --Dave On Sat, Mar 16, 2019 at 5:08 PM rain1290--- via R-help <r-help at r-project.org> wrote:> Hi there, > I am using climate model data in attempt to create a time series for a > specific location. Getting longitude and latitude is fine. However, I am > receiving the following error when using the "ncvar_get" function in trying > to derive the "time" dimension: > Error in nc$dim[[idobj$list_index]] : > attempt to select more than one element in get1index <real> > What could be causing this? > -This is what I have done so far: > #CanESM2 plotting for specified yearncfname<-"MaxPrecCCCMACanESM2rcp45.nc" > Prec<-raster(ncfname) > print(Prec) > Model<-nc_open(ncfname)longitude<-ncvar_get(Model, "lon") #Works fine > latitude<-ncvar_get(Model, "lat") #Works fine > time<-ncvar_get(Model, "time") #Error in nc$dim[[idobj$list_index]] : > attempt to select more than one element in get1index <real> > > > Here is the structure of the file after using "nc_open": > File MaxPrecCCCMACanESM2rcp45.nc (NC_FORMAT_NETCDF4): > > 3 variables (excluding dimension variables): > double onedaymax[lon,lat,time] (Contiguous storage) > units: mm/day > double fivedaymax[lon,lat,time] (Contiguous storage) > units: mm/day > short Year[time] (Contiguous storage) > > 3 dimensions: > time Size:95 > lat Size:64 > units: degree North > lon Size:128 > units: degree East > What could be causing this error? > Thanks in advance, and I look forward to your response! > [[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. >-- David W. Pierce Division of Climate, Atmospheric Science, and Physical Oceanography Mail Stop 0230 Scripps Institution of Oceanography, La Jolla, California, USA (858) 534-8276 (voice) / (858) 534-8561 (fax) dpierce at ucsd.edu [[alternative HTML version deleted]]