It works just the same as matrices:
> z <- zoo(cbind(a = c(1, NA, 3), b = c(NA, 10, 11)))
> z[is.na(z)] <- 999
> z
a b
1 1 999
2 999 10
3 3 11
>
There are also a number of other methods for handling NAs in zoo:
na.approx
na.contiguous
na.locf
na.spline
na.trim
and na.stinterp in the
This is the same set of data that I have been working with for those
in the know. it is a matrix of ~174 columns and ~70,000 rows. I have
it as a zoo object, but I could read it in as just a matrix as long as
the date time stamp won't be corrupted.
here is an example of what a column would look
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