While going through the tutorials of DataFrames from MLJ, I encountered the following error
julia> b2 = select(boston, Not(:NOx))
ERROR: UndefVarError: Not not defined
Stacktrace:
[1] top-level scope at none:0
Link to the tutorial: https://alan-turing-institute.github.io/DataScienceTutorials.jl/data/dataframe/
This operation should work:
julia> b2 = select(boston, Not(:NOx))
506×13 DataFrame
Row │ Crim Zn Indus Chas Rm A ⋯
│ Float64 Float64 Float64 Int64 Float64 F ⋯
─────┼───────────────────────────────────────────────
1 │ 0.00632 18.0 2.31 0 6.575 6 ⋯
2 │ 0.02731 0.0 7.07 0 6.421 7
3 │ 0.02729 0.0 7.07 0 7.185 6
⋮ │ ⋮ ⋮ ⋮ ⋮ ⋮ ⋱
504 │ 0.06076 0.0 11.93 0 6.976 9
505 │ 0.10959 0.0 11.93 0 6.794 8 ⋯
506 │ 0.04741 0.0 11.93 0 6.03 8
8 columns and 500 rows omitted
Please make sure that you are using the latest DataFrames.jl version. Go to package manager mode by pressing ] in the Julia REPL and then write:
(@v1.6) pkg> st DataFrames
Status `~/.julia/environments/v1.6/Project.toml`
[a93c6f00] DataFrames v0.22.5
Your version number should be 0.22.5 (as of time of this writing).
If it is some older version you probably have some other package that restricts updating of DataFrames.jl. Here is a post describing how to diagnose such situations.