A, B, C, D

1

2

3

4

A

B

C

D

B − A − D − C

𝑧 = 1 𝑧 = 0

𝑦1𝑏

𝑦0𝑏

𝑦𝑎

𝒙

1

𝑁

𝑖=1

𝑁 𝑦𝑏𝑖 − 𝑦𝑎𝑖

𝑝(𝑧 = 1)

𝑧𝑖 − 𝑒𝑖

1 − 𝑒𝑖

𝑎

𝑏

𝑦

𝑁 𝑒𝑖 = 𝑝 𝑧𝑖 = 1 𝒙𝑖

𝑧 = 1

𝑧 = 0

𝛽 LASSO = argmin𝛽 𝑦 − 𝑿 𝛽𝑇

𝑦 − 𝑿 𝛽 + 𝜆∑𝑗=1𝑝

𝛽𝑗

𝑖 (𝑗, 𝑘)

𝑖 (𝑗, 𝑘)

𝑖, 𝑗, 𝑘 0 ≤ 𝑖 ≤ 15, 1 ≤ 𝑗 ≤ 9, 1 ≤ 𝑘 ≤ 16

𝜆

𝜆

𝜆

𝛽

𝛽