Julia Dataframes Countmap()
Edit: Countmap() Is in Statsbase. Jl and Is Working as Expected. I'm Not Sure How to Change This to an Answered Problem or If I Should I Delete It. Using...
Edit: countmap() is in StatsBase.jl and is working as expected. I'm not sure how to change this to an answered problem or if I should I delete it.
using DataFrames
using CSV
train = DataFrame(CSV.File("training.csv"))
countmap(train.column)
UndefVarError: countmap not defined
Stacktrace:
[1] top-level scope
@ In[40]:1
[2] eval
@ .\boot.jl:360 [inlined]
[3] include_string(mapexpr::typeof(REPL.softscope), mod::Module, code::String, filename::String)
@ Base .\loading.jl:1094
I get that error running the code. Was countmap deprecated at some point and I just cannot find any updates about it or am I missing something?
2 Answers
Are you looking for countmap from the StatsBase.jl package?
You can use the following pattern to get a DataFrame instead of a Dict as a result:
combine(groupby(train, :column), nrow)
(in many cases it will be much faster than countmap)
Also instead of:
DataFrame(CSV.File("training.csv"))
it is more efficient to write:
CSV.read("training.csv", DataFrame)
Elena Rostova holds a Master's degree in Public Health Journalism. She covers groundbreaking medical research, holistic wellness trends, mental health awareness, and nutritional science.
