Hello,
I wish to create a copy of a data frame, but with missing values replaced
with NAs.

I thought I should be able to do it in one step using parentheses to group
the statements and force those inside the parens to execute first:

df <- (BWS6[BWS6 < -998] <- NA)

But all this does is assign NA to df, as described in ?"[" for the case
with no parens.

Can I do this in some way? It's no great problem of course to have two
separate statements, just curious.

Ben.

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