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

[John Kane]

--- Gregor Gorjanc <gregor.gorjanc at bfro.uni-lj.si>
wrote:

> 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
> 

Thanks very much.  I have a wealth of approaches now.