📂줄리아

줄리아에서 가중치를 주고 랜덤 샘플링 하는 법

개요

줄리아에서 R에서의 sample()이나 파이썬 패키지 numpy의 random.choice()와 같은 역할을 하는 함수인 sample()과 Weights 함수의 사용법이다.

코드 ¹

using StatsBase
items = 0:5
weights = 0:5
sample(items, Weights(weights))

# With replacement
my_samps = sample(items, Weights(weights), 10)
# Without replacement
my_samps = sample(items, Weights(weights), 2, replace=false)

실행 결과

julia> using StatsBase

julia> items = 0:5
0:5

julia> weights = 0:5
0:5

julia> sample(items, Weights(weights))
5

julia> # With replacement

julia> my_samps = sample(items, Weights(weights), 10)
10-element Array{Int64,1}:
 4
 3
 2
 1
 3
 3
 5
 5
 2
 2

julia> # Without replacement

julia> my_samps = sample(items, Weights(weights), 2, replace=false)
2-element Array{Int64,1}:
 4
 5

환경

• OS: Windows
• julia: v1.5.0