Grouped Data Frames

Lincoln_Hannah
Mon, 06 Feb 2023 04:12:28 +0000
General Usage

I find querying a JuliaDB IndexedTable is 20% faster than a DataFrame. But selecting a group from a GroupedDataFrame (GDF) is 200 times faster. So I’d like to work more with GDFs. I notice

New columns in the underlying DF will flow through to the GDF which is great

Using push!() on the DF breaks the GDF.
Would it be possible to allow push!() and pop!() without breaking the GDF?

Would it be possible to allow a GDF to be written to and from a folder of CSVs. (one file per group).

(I think CSV.jl used to allow reading multiple CSVs but the functionality was removed ? )

9 posts - 3 participants