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No.164 Maximum Gap
No.164 Maximum GapGiven an unsorted array, find the maximum difference between the successive elements in its sorted form.Try to solve it in linear ti...
分类:其他好文   时间:2015-06-08 19:01:57    阅读次数:80
统计学习方法(感知器)
感知机 假设:输入空间是 x?Rn 输出空间是 y={+1,-1} 由如下2.1函数进行分类称之为感知器 其中,w为权值向量,b为偏置 sign(.)是符号函数,记为如下所示: 感知机是一种线性分类模型,属于判别模型。 感知机模型的假设空间是定义在特征空间中的 所有线性分类模型(linear cla...
分类:其他好文   时间:2015-06-07 21:24:44    阅读次数:120
Locally Weighted Linear Regression 局部加权线性回归-R实现
线性回归容易出现过拟合或欠拟合的问题。局部加权线性回归是一种非参数学习方法,在对新样本进行预测时,会根据新的权值,重新训练样本数据得到新的参数值,每一次预测的参数值是不相同的。权值函数:t用来控制权值的变化速率(建议对于不同的样本,先通过调整t值确定合适的t)不同t值下的权值函数图像:局部加权线性回...
分类:其他好文   时间:2015-06-07 18:41:19    阅读次数:4194
MachineLearning ---- lesson 2 Linear Regression with One Variable
Linear Regression with One Variablemodel Representation以上篇博文中的房价预测为例,从图中依次来看,m表示训练集的大小,此处即房价样本数量;x表示输入变量或feature(特征),此处即房子面积;y是输出变量或目标变量,此处即房子价格。(x,y)...
分类:系统相关   时间:2015-06-07 06:10:54    阅读次数:214
PRML-Chapter3 Linear Models for Regression
Example: Polynomial Curve Fitting The goal of regression is to predict the value of one or more continuous target variables t given the value of a D-d...
分类:其他好文   时间:2015-06-06 23:27:37    阅读次数:369
leetcode single number 及其扩展 (转)
Given an array of integers, every element appearstwiceexcept for one. Find that single one.Note:Your algorithm should have a linear runtime complexity...
分类:其他好文   时间:2015-06-06 13:18:38    阅读次数:123
Java for LeetCode 163 Maximum Gap
Given an unsorted array, find the maximum difference between the successive elements in its sorted form.Try to solve it in linear time/space.Return 0 ...
分类:编程语言   时间:2015-06-05 21:00:00    阅读次数:128
[D3] 3. Scaling Basics
d3.scale.linear()
分类:其他好文   时间:2015-06-03 23:29:20    阅读次数:181
Java for LeetCode 137 Single Number II
Given an array of integers, every element appears three times except for one. Find that single one. Note:Your algorithm should have a linear runtime c...
分类:编程语言   时间:2015-06-03 17:29:50    阅读次数:136
Java for LeetCode 136 Single Number
Given an array of integers, every element appears twice except for one. Find that single one. Note:Your algorithm should have a linear runtime complex...
分类:编程语言   时间:2015-06-03 13:27:52    阅读次数:139
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