•Iterator to handle
data too big to read on memory at once.
–GPhys::IO.each_along_dims_write
– the result also written in file (since the result of
operations is often big too.) Another type of
iterator is planned but yet to be implemented.
•Example:
–Without the iterator：
– in = GPhys::IO.open(infile, varname)
– ofile =
NetCDF.create(ofilename)
– out =
in.mean(0)
# now,
the entire result is on memory
–
GPhys::IO.write( ofile, out )
–
ofile.close
–With the iterator,
taking the last dimension to make a loop：
– in = GPhys::IO.open(infile, varname)
– ofile =
NetCDF.create(ofilename)
– out =
GPhys::IO.each_along_dims_write(in, ofile, -1){ |in_sub|
–
[ in_sub.mean(0) ] # written in ofile
each time
–
}
– ofile.close