> > Does anyone know an easy way to convert all the zero values in a
> imported csv table into NA's
>
> Depends on the data structure you gave your imported table. In a
> single numeric vector (named, say, vec), the syntax is
>
> is.na(vec[vec==0]) <- TRUE
That throws errors for me. An alternative is
vec[vec==0] <- NA
This also works for data frames, e.g.
df <- data.frame(a=c(1,2,3,0,3,4,0,5,2), b=c(1,0,0,1,1,0,1,1,0))
df[df==0] <- NA
Regards,
Richie.
Mathematical Sciences Unit
HSL
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