Outputing/Inputing vectors in DataFrames

[nilshg]

This is a very old question to which the answer is no: if you want to store additional structure with your data, don’t use csv.

See e.g. this prior discussion:

DataFrames/CSV: how to read vectors from *.csv?

Dear folks, unfortunately, I fail to read vectors from a *.csv file. Here is an MWE: using CSV, DataFrames df = DataFrame( A=[[1,2,3], [4,5,6]] ) file = "my_test.csv" CSV.write(file, df, delim=';') new_df = DataFrame( CSV.File(file; delim=';' ) ) The problem is that column A in new_df of type String: jjulia> new_df 2×1 DataFrame Row │ A │ String ─────┼─────────── 1 │ [1, 2, 3] 2 │ [4, 5, 6] I also tried: CSV.File( file; types=Dict(:B => Vector{Int}) ) and CSV.F…