| att.get.nc {RNetCDF} | R Documentation |
Get an attribute from a NetCDF dataset.
att.get.nc(ncfile, variable, attribute)
ncfile |
Object of class "NetCDF" which points to the NetCDF dataset (as returned from open.nc). |
variable |
ID or name of the variable from which the attribute will be read, or "NC_GLOBAL" for a global attribute. |
attribute |
Attribute name or ID. |
This function returns the value of the attribute.
A vector of type character if the on-disk type is NC_CHAR, otherwise numeric. No distinction is made between the different storage types of numeric objects.
NC_BYTE is always interpreted as signed.
Pavel Michna
http://www.unidata.ucar.edu/packages/netcdf/
## Create a new NetCDF dataset and define two dimensions
nc <- create.nc("foo.nc")
dim.def.nc(nc, "station", 5)
dim.def.nc(nc, "time", unlim=TRUE)
## Create two variables, one as coordinate variable
var.def.nc(nc, "time", "NC_INT", "time")
var.def.nc(nc, "temperature", "NC_DOUBLE", c(0,1))
## Put some attributes
att.put.nc(nc, "temperature", "missing_value", "NC_DOUBLE", -99999.9)
att.put.nc(nc, "temperature", "long_name", "NC_CHAR", "air temperature")
att.put.nc(nc, "NC_GLOBAL", "title", "NC_CHAR", "Data from Foo")
att.put.nc(nc, "NC_GLOBAL", "history", "NC_CHAR", paste("Created on", date()))
## Get these attributes
att.get.nc(nc, "temperature", "missing_value")
att.get.nc(nc, "temperature", "long_name")
att.get.nc(nc, "NC_GLOBAL", "title")
att.get.nc(nc, "NC_GLOBAL", "history")
close.nc(nc)