原文:CheeseZH: Stanford University: Machine Learning Ex3: Multiclass Logistic Regression and Neural Network Prediction

Handwritten digits recognition Multi class Logistic Regression . Vectorizing Logistic Regression Vectorizing the cost function Vectorizing the gradient Vectorizing the regularized cost function Vector ...

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机器学习---逻辑回归(一)(Machine Learning Logistic Regression I)

逻辑回归(Logistic Regression)是一种经典的线性分类算法。逻辑回归虽然叫回归,但是其模型是用来分类的。 让我们先从最简单的二分类问题开始。给定特征向量x=([x1,x2,...,xn])T以及每个特征的权重w=([w1,w2,...,wn])T,阈值为b,目标y是两个分类 ...

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Deep learning:四(logistic regression练习)

  前言:   本节来练习下logistic regression相关内容,参考的资料为网页:http://openclassroom.stanford.edu/MainFolder/DocumentPage.php?course=DeepLearning&doc ...

Sun Mar 17 05:59:00 CST 2013 12 29183
 
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