Error when trying to import NetCDF to R

Question

I\' struggeling to open a NetCDF file in R. When I try to open it with

library(ncdf)
# read in NetCDF file
maize.nc<-open.ncdf(\"C:/Users/Jo/Desktop/pft_         


        

Answer 1

The dump from ncdump -k gives the netcdf file format as netCDF-4. I was able to open the file with the ncdf4 package since ncdf does not seem to be backwards compatible with version 4 files:

"However, the ncdf package does not provide an interface for netcdf version 4 files."

from the ncdf4 documentation.

library(ncdf4)
mycdf <- nc_open(file.choose(), verbose = TRUE, write = FALSE)
timedata <- ncvar_get(mycdf,'time')
lat <- ncvar_get(mycdf,'latitude')
long <- ncvar_get(mycdf,'longitude')
harvestdata <- ncvar_get(mycdf,'harvest')

str(harvestdata)

gives

num [1:79, 1:78, 1:32, 1:199] NA NA NA NA NA NA NA NA NA NA ...