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云计算-为什么要使用cloudMany cloud providers(一些提供云服务的商家)EC2:提供computing servicesS3:提供the ability to store data,可以在任何地方访问它们EBS:提供Block Storage,EC2 instances可以在它... 阅读全文
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Regularization:Regularized logistic regressionwithout regularization当features很多时会出现overfitting现象,图上的cost function是没有使用regularization时的costfunction的计算公... 阅读全文
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machine learning(13) --Regularization:Regularized linear regressionGradient descentwithout regularization with regularization θ0与原来是的没有... 阅读全文
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solving the problem of overfitting:regularization发生的在linear regression上面的overfitting问题发生在logistic regression上面的overfitting怎么解决overfittingregularizatio... 阅读全文
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不同的λ(0,1,10,100)值对regularization的影响\ 预测新的值和计算模型的精度%% ============= Part 2: Regularization and Accuracies =============% Optional Exercise:% In this ... 阅读全文
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求得θ值后用模型来预测 / 计算模型的精度ex2.m部分程序%% ============== Part 4: Predict and Accuracies ==============% After learning the parameters, you'll like to use it t... 阅读全文
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2015年记录想要感谢的一些人与事卫老师让我知道了coursera这个网站上面的machine learning课程博士师姐韩朝教了我一些matlab的东西博士(阳光普照人间,暂时还不知道名字)帮我统稿同学何雨龙的matlab的安装包分享同学杨涛的matlab的热心帮助同学高志英帮我占座 阅读全文
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Regularized logistic regression : mapFeature(将feature增多) and costFunctionRegex2_reg.m文件中的部分内容%% =========== Part 1: Regularized Logistic Regression ==... 阅读全文
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Regularized logistic regression : plot data(画样本图)ex2data2.txt0.051267,0.69956,1-0.092742,0.68494,1-0.21371,0.69225,1-0.3... 阅读全文
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画decision boundary(直线)%% ============= Part 3: Optimizing using fminunc =============% In this exercise, you will use a built-in function (fminunc) t... 阅读全文