1.题目分别使用岭回归和Lasso解决薛毅书第279页(PDF为p331)例6.10的回归问题
2.准备2.1.准备安装和加载包使用到R语言的函数和对应包
函数
功能
包 lm.ridge
提供岭回归函数
ridge
linearRidge
自动进行岭参数选择,Cule(2012)
MASS
lars
提供最小角回归、lasso等回归模型
lars
说...
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编程语言 时间:
2015-06-29 10:15:40
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2086
Description
Farmer John's cows have discovered that the clover growing along the ridge of the hill (which we can think of as a one-dimensional number line) in his field is particularly good.
...
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编程语言 时间:
2015-06-23 21:41:15
阅读次数:
155
Description
Farmer John's cows have discovered that the clover growing along the ridge of the hill (which we can think of as a one-dimensional number line) in his field is particularly good.
Fa...
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其他好文 时间:
2015-06-03 21:43:24
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119
引言这一小节介绍一下支持向量回归,我们在之前介绍的核逻辑回归使用表示定理(Representer Theorem),将逻辑回归编程Kernel的形式,这一节我们沿着这个思路出发,看看如何将回归问题和Kernel的形式结合起来。Kernel Ridge Regression上次介绍的表示定理告诉我们,如果我们要处理的是有L2的正则项的线性模型,其最优解是数据zn的线性组合。我们可以将这样的线性模型变成...
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其他好文 时间:
2015-05-03 23:41:49
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415
前面两篇回归(一)(二)复习了线性回归,以及L1与L2正则——lasso和ridge regression。特别描述了lasso的稀疏性是如何产生的。在本篇中介绍一下和lasso可以产生差不多效果的两种方法:stagewise和LARS...
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其他好文 时间:
2015-04-06 14:15:37
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3088
COWs
Description
Farmer John's cows have discovered that the clover growing along the ridge of the hill (which we can think of as a one-dimensional number line) in his field is particularly good.
...
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其他好文 时间:
2015-04-03 09:37:16
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159
本篇内容讲述回归问题中最常用的ridge regression与Lasso,同时深入浅出地探讨稀疏约束,正则,分析了Lasso稀疏的原因。...
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其他好文 时间:
2015-03-20 00:04:57
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322
开一个机器学习方法科普系列,也做基础回顾之用。学而时习之。
content:
linear regression, Ridge, Lasso
Logistic Regression, Softmax
Kmeans, GMM, EM, Spectral Clustering
......
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其他好文 时间:
2015-03-07 01:04:29
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231
Farmer John's cows have discovered that the clover growing along the ridge of the hill (which we can think of as a one-dimensional number line) in his field is particularly good.
Farmer John has N cows (we number the cows from 1 to N). Each of Farmer Joh...
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编程语言 时间:
2015-02-06 09:41:36
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201
MLlib支持二分类,多酚类和回归分析的多种方法,具体如下:问题类别 支持方法二分类线性支持向量机, 逻辑回归,决策树,朴素贝叶斯多分类决策树,朴素贝叶斯回归线性最小二乘,Lasso,ridge regression, 决策树线性模型二分类(支持向量机, 逻辑回归)线性回归(最小二乘,Lasso,....
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其他好文 时间:
2015-01-13 15:39:08
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469