Import data Julia

start.jl

using CSV
using DataFrames
using Statistics

data = CSV.read("./iris_data.txt",header=false)

## no more head
first(data,5)

# renaming column header
rename!(data, Symbol.(["sepal_length","sepal_width","petal_length","petal_width","class"]))

unique(data."class")

## map values to class - we are using a dict here // Have you heard R, YES, real dictionaries
let d=Dict(:"Iris-setosa" => 0, :"Iris-versicolor" => 1, :"Iris-virginica" => 2)
    data[:class] = map(elt->d[elt], data[:class])
end