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摘要： Logistic Regression Model 1. Cost Function We cannot use the same cost function that we use for linear regression because the Logistic Function will c 阅读全文

摘要： Logistic Regression Model 1. Cost Function We cannot use the same cost function that we use for linear regression because the Logistic Function will c 阅读全文

摘要： Classification and representation 1. Classification To attempt classification, one method is to use linear regression and map all predictions greater 阅读全文

摘要： Computing Parameters Analytically 1 Normal Equation(正规方程) Gradient descent gives one way of minimizing J. Let’s discuss a second wayof doing so, this 阅读全文

摘要： Multivariate Linear regression 1. Multiple Features Linear regression with multiple variables is also known as "multivariate linear regression". We no 阅读全文

摘要： Parameter Learning 刚发现这儿的markdown似乎不支持latex公式，是我没正确打开么。。。。 1. Gradient Descent So we have our hypothesis function and we have a way of measuring how w 阅读全文

摘要： Model and Cost Function 1. Model Representation To establish notation for future use, we’ll use x(i) to denote the “input”variables (living area in th 阅读全文

摘要： Python一周学习心得 ​ 作为一个学习过C和C 的学习者，第一周学习python的基本语法还是比较轻松的，python近似于英语的语法使用起来还是挺轻松的。 ​ 从简单的print到函数定义，这些基础的东西掌握起来应该是不费力气的。所以下一步计划找一些代码进行通读和理解。就像一个人来到陌生的国度 阅读全文

摘要： Machine Learning 1. What is Machine Learning? Two definitions of Machine Learning are offered. Arthur Samuel described it as: "the field of study that 阅读全文

摘要： python安装 ​ 因为硬件原因，就忽略OSX系统了，等买得起再说。 1. windows下安装 1. 在http://python.org/download下载并安装Python 2. 在运行终端程序（Powershell） 3. 在终端程序中运行 python 4. 使用时，用powershe 阅读全文