[Pytables-users] truncate float arrays to save space?

[Andreas H. <li...@hi...>]

Hi,

the netcdf4-python project
(http://netcdf4-python.googlecode.com/svn/trunk/docs/netCDF4.Dataset-class.html#createVariable)
supports a "least_significant_digit" attribute when creating a
variable/array. This leads to a truncation of the array data before
storing it to disk
(https://code.google.com/p/netcdf4-python/source/browse/trunk/netCDF4_utils.py#26),
which leads to be zlib compression more effective.

My question: Is the same true when I compress the array data with blosc?
Will I get significant compression improvements when truncating my data
before storing it in pytables?

Thanks for your insight :)

-- Andreas.