Hello,
I have two large data frames, 'liss' (170 million obs, 8 variables) and
'fobb' (52 million obs, 8 variables, same as for 'liss'), and checking
their sizes I get
> object.size(liss)
7477492552 bytes
> object.size(fobb)
2494591736 bytes
Fair enough, but when I save them to disk (saveRDS), the size relation
is reversed: 'fobb.rds' takes up 273 MB while 'liss.rds' uses 146 MB!
I was puzzled by this and thought that I had made a mistake in creating
them, but the only explanation I can find for this is that 'liss'
contains a lot more missing values.
Suggestions?
Thanks, Göran
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