Dale Black (Feb 15 2021 at 04:38): Dale Black (Feb 15 2021 at 04:38):Is there a simple way to logically index a DataFrame?
For example, if I want to keep every row that has a 1 and discard every row that has a 0 in the column x
df[:, :x] .== 1
This returns a BitArray of Bool how would I use this BitArray to filter the entire DataFrame?
Dale Black (Feb 15 2021 at 04:41):This seems to work!
filter(:x => isequal(1), df)
Yes, that's the way - there's also the in-place version filter!, and @view df[df.x .== 1, :]
Last updated: Nov 07 2025 at 04:42 UTC