Matt Knox (el 2007-05-03 a les 19:26:58 +0000) va dir:: > One slight problem with this approach is that columns can't be dynamically > added/removed from tables (as far as I know), so that boolean column would > always need to be there even if the MaskedArray had no masked values to > account > for the possibility of masked values being appended to it in the future. This > wouldn't impact functionality, but would impact performance a bit.
Well, I guess that compression (even at a low ratio) would alleviate the
I/O burden of storing the mask side to side with data, specially if most
elements in the mask have the same values (e.g. when nearly all data
points have known values).
::
Ivan Vilata i Balaguer >qo< http://www.carabos.com/
Cárabos Coop. V. V V Enjoy Data
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