๊ด€๋ฆฌ ๋ฉ”๋‰ด

๋ชฉ๋ก๋žœ๋คํฌ๋ ˆ์ŠคํŠธ ํ•˜์ดํผํŒŒ๋ผ๋ฏธํ„ฐ (1)

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[Python] Random Forest ์•Œ๊ณ ๋ฆฌ์ฆ˜ ์ •์˜, ์žฅ๋‹จ์ , ์ตœ์ ํ™” ๋ฐฉ๋ฒ•

๐Ÿ“š๋ชฉ์ฐจ 1. ๋žœ๋คํฌ๋ ˆ์ŠคํŠธ ์ •์˜ 2. ๋žœ๋คํฌ๋ ˆ์ŠคํŠธ ์žฅ๋‹จ์  3. ์‹ค์Šต์ฝ”๋“œ ๋ฐ ๋ฐ์ดํ„ฐ์…‹ 4. ์ฝ”๋“œ ์„ค๋ช… 1. Random Forest ์ •์˜ Random Forest๋Š” ์˜์‚ฌ๊ฒฐ์ •๋‚˜๋ฌด ๋ชจ๋ธ ์—ฌ๋Ÿฌ ๊ฐœ๋ฅผ ํ›ˆ๋ จ์‹œ์ผœ์„œ ๊ทธ ๊ฒฐ๊ณผ๋ฅผ ์ข…ํ•ฉํ•ด ์˜ˆ์ธกํ•˜๋Š” ์•™์ƒ๋ธ” ์•Œ๊ณ ๋ฆฌ์ฆ˜์ž…๋‹ˆ๋‹ค. ๊ฐ ์˜์‚ฌ๊ฒฐ์ •๋‚˜๋ฌด ๋ชจ๋ธ์„ ํ›ˆ๋ จ์‹œํ‚ฌ ๋•Œ ๋ฐฐ๊น…(Bagging) ๋ฐฉ์‹์„ ์‚ฌ์šฉํ•ฉ๋‹ˆ๋‹ค. ๋ฐฐ๊น…์€ ์ „์ฒด Train dataset์—์„œ ์ค‘๋ณต์„ ํ—ˆ์šฉํ•ด ์ƒ˜ํ”Œ๋งํ•œ Dataset์œผ๋กœ ๊ฐœ๋ณ„ ์˜์‚ฌ๊ฒฐ์ •๋‚˜๋ฌด ๋ชจ๋ธ์„ ํ›ˆ๋ จํ•˜๋Š” ๋ฐฉ์‹์ž…๋‹ˆ๋‹ค. ์ด๋ ‡๊ฒŒ ์—ฌ๋Ÿฌ ๋ชจ๋ธ์„ ํ†ตํ•ด ์˜ˆ์ธกํ•œ ๊ฐ’์€ ํ‰๊ท ์„ ์ทจํ•˜์—ฌ ์ตœ์ข…์ ์ธ ์˜ˆ์ธก๊ฐ’์„ ์‚ฐ์ถœํ•ฉ๋‹ˆ๋‹ค. ์ด ๋ฐฐ๊น… ๋ฐฉ์‹์€ ์˜ˆ์ธก ๋ชจ๋ธ์˜ ์ผ๋ฐ˜ํ™”(generalization, a.k.a., ์•ˆ์ •์„ฑ) ์„ฑ๋Šฅ์„ ํ–ฅ์ƒํ•˜๋Š” ๋ฐ ๋„์›€์ด ๋ฉ๋‹ˆ๋‹ค. 2. ๋žœ๋คํฌ๋ ˆ์ŠคํŠธ ์žฅ๋‹จ์  ์žฅ์  ๋‹จ์  ์ผ๋ฐ˜ํ™” ๋ฐ ์„ฑ๋Šฅ..