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利用線性回歸和局部加權線性回歸分別來預測鮑魚年齡,充分感知兩種方法的優劣點。

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代碼片段和文件信息

#?-*-?coding:?utf-8?-*-
“““
Created?on?Fri?May??4?10:53:58?2018

@author:?FZ
“““

import?function
import?numpy?as?np

abXabY?=?function.loadDataSet(‘abalone.txt‘)

#locally?weighted?linear?regression
yHat01?=?function.lwlrTest(abX[0:99]abX[0:99]abY[0:99]0.1)?#training?set?#0-99
yHat1?=?function.lwlrTest(abX[0:99]abX[0:99]abY[0:99]1)
yHat10?=?function.lwlrTest(abX[0:99]abX[0:99]abY[0:99]10)

#error
error01?=?function.rssError(abY[0:99]yHat01.T)???#56.820227823572182
error1?=?function.rssError(abY[0:99]yHat1.T)???#429.89056187016683
error10?=?function.rssError(abY[0:99]yHat10.T)???#549.1181708825128


#generalization?
yHat01g?=?function.lwlrTest(abX[100:199]abX[100:199]abY[100:199]0.1)?#test?set?#100-199
yHat1g?=?function.lwlrTest(abX[100:199]abX[100:199]abY[100:199]1)
yHat10g?=?function.lwlrTest(abX[100:199]abX[100:199]abY[100:199]10)

#error
error01g?=?function.rssError(abY[100:199]yHat01g.T)???#36199.797699875046
error1g?=?function.rssError(abY[100:199]yHat1g.T)???#231.81344796874004
error10g?=?function.rssError(abY[100:199]yHat10g.T)???#291.87996390562728

#compare
#k?=?0.1?overfitting


#linear?regression
ws?=?function.standRegres(abX[0:99]abY[0:99])
yHat?=?np.mat(abX[100:199])*ws
errorlr?=?function.rssError(yHat.T.AabY[100:199])???#518.63631532510897

#compare
#lwlr?is?better?than?lr

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2018-05-04?11:09??8.3_predict_abalone_age\__pycache__\
?????文件????????1874??2018-05-04?11:09??8.3_predict_abalone_age\__pycache__\function.cpython-36.pyc
?????文件??????197357??2011-01-19?17:17??8.3_predict_abalone_age\abalone.txt
?????文件????????1378??2018-05-04?11:27??8.3_predict_abalone_age\do_prediction.py
?????文件????????2648??2018-05-04?11:09??8.3_predict_abalone_age\function.py

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