Set values to missing

[ymer]

In standard Julia, I can set a column to missing in this way:
df.year .= missing

In Tidyverse I can set a column to missing like this:
mutate(df, year = NA)

The Tidier equivalent would be:
@mutate(df, year = missing)

However, this does not work.

[kdpsingh]

Thanks for catching this issue. This is totally fixable.

The issue is that TidierData.jl thinks you are referring to a column named missing instead of the value of missing.

For now, you can use !! to indicate that you're referring to the value rather than the column name.

This should work, but I haven't tested it.

@mutate(df, year = !!missing)

However, for common keywords like missing, true, and false, we will fix this in TidierData.jl so that this workaround isn't needed.

[ymer]

I have tried
@mutate(df, year = !!missing)
and
@mutate(df, year = [!!missing])

Neither work

[kdpsingh]

Thanks. We will look and get this fixed.

[kdpsingh]

This is now fixed in #69. Both of these should now work:

julia> df = DataFrame(a = 1:5)
5×1 DataFrame
 Row │ a     
     │ Int64 
─────┼───────
   1 │     1
   2 │     2
   3 │     3
   4 │     4
   5 │     5

julia> @chain df @mutate(b = missing, c = !!missing)
5×3 DataFrame
 Row │ a      b        c       
     │ Int64  Missing  Missing 
─────┼─────────────────────────
   1 │     1  missing  missing 
   2 │     2  missing  missing 
   3 │     3  missing  missing 
   4 │     4  missing  missing 
   5 │     5  missing  missing