1. Feedforward and cost function; 2.Regularized cost function: 3.Sigmoid gradient The gradien ...
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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1. Feedforward and cost function; 2.Regularized cost function: 3.Sigmoid gradient The gradien ...
源码:https://github.com/cheesezhe/Coursera-Machine-Learning-Exercise/tree/master/ex5 Introduction: In this exercise, you will implement regularized ...
Logistic Regression with a Neural Network mindset Welcome to the first (required) programming exercise of the deep learning specialization. ...
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 ...
针对交叉(高阶)特征学习提出的DeepFM是一个end-to-end模型,不需要像wide&deep那样在wide端人工构造特征。 网络结构: sparse features的构 ...
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 ...
在之前的问题讨论中,研究的都是连续值,即y的输出是一个连续的值。但是在分类问题中,要预测的值是离散的值,就是预测的结果是否属于某一个类。例如:判断一封电子邮件是否是垃圾邮件;判断一次金融交易是否是 ...
LSTM NEURAL NETWORK FOR TIME SERIES PREDICTION Wed 21st Dec 2016 Neural ...