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require "numru/netcdf"
include NumRu
file3 = NetCDF.create("test_nc3.nc")
NetCDF.creation_format = ( NetCDF::NC_NETCDF4 | NetCDF::NC_CLASSIC_MODEL )
file4 = NetCDF.create("test_nc4.nc")
nx, ny = 100, 50
[ file3, file4 ].each do |file|
xdim = file.def_dim("x",nx)
ydim = file.def_dim("y",ny)
x = file.def_var("x","sfloat",[xdim])
y = file.def_var("y","sfloat",[ydim])
v1 = file.def_var("v1","sfloat",[xdim,ydim])
v2 = file.def_var("v2","int",[xdim,ydim])
if /nc4/ =~ file.path
v1.deflate(2) # set the deflation (compression) level 2
v2.deflate(2,true) # set the deflation level 2 with the shuffle filter
puts "v1 deflate params:"
p v1.deflate_params
puts "v2 deflate params:"
p v2.deflate_params
end
file.enddef
x.put( NArray.float(nx).indgen! )
y.put( NArray.float(ny).indgen! )
z = NArray.float(nx,ny).indgen! + 1000000
z[true,ny/2..-1] = 0 # to see the impac
v1.put(z)
v2.put(z)
file.close
end
puts "Created test_nc3.nc test_nc4.nc.", "File size comparison:"
print `ls -l test_nc3.nc test_nc4.nc`
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