| cdfextract {clim.pact} | R Documentation |
A slow routine that extraxcts a subfield. This routine is
suitable for reading subsections of large data files that are too big
for retrieve.nc.
This version uses cdfcont to obtain vital meta data for
handling the data in the netCDF file and constructing a 'field' object.
cdfextract(filename,varname,x.rng=NULL,y.rng=NULL,t.rng=NULL,
greenwich=TRUE,x.nam="lon",y.nam="lat",t.nam="tim",
plot=TRUE,l.scale=TRUE)
filename |
name of netCDF file. |
varname |
name ov variable. |
x.rng |
X-range (in degrees East): c(min,max). |
y.rng |
Y-range (in degrees North): c(min,max). |
t.rng |
T-range (in units stored in 'tim'): c(min,max). |
greenwich |
TRUE: longitude runs from -180E to 180E. |
x.nam |
name of X-dimension. |
y.nam |
name of Y-dimension. |
t.nam |
name of T-dimension. |
plot |
TRUE for plotting. |
l.scale |
scale field by offset and scaling-factor. |
a field object. Also see retrieve.nc. Saves the
extracted data in a netCDF file called "cdfextract.nc" under current
working directory (see r2cdf).
R.E. Benestad
## Not run:
slp <- cdfextract("data/nmc_slp.nc","slp",x.rng=c(-80,40),y.rng=c(20,75),
t.rng=c(times[is],times[is]+499),plot=FALSE)
## End(Not run)