[R] setting a number of values to NA over a data.frame.

[Gregor Gorjanc]

Jim Lemon <jim <at> bitwrit.com.au> writes:
> Hi John,
> You might have a look at "toNA" in the prettyR package. Wait for version 
> 1.0-4, just uploaded, as I have fixed a bug in that function.

There is also a set of generic functions exactly for such cases: unknownToNA(),
NAToUnknown() and isUnknown() in gdata package.

Gregor