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Linear Basis Function Models 线性模型的一个关键属性是它是参数的一个线性函数,形式如下: w是参数,x可以是原始的数据,也可以是关于原始数据的一个函数值,这个函数就叫basis function,记作φ(x),于是线性模型可以表示成: w0看着难受,定义一个函数φ0(x) 阅读全文
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1.1. Example: Polynomial Curve Fitting 1. Movitate a number of concepts: (1) linear models: Functions which are linear in the unknow parameters. Polyn 阅读全文
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x, a vector, and all vectors are assumed to be column vectors. M, denote matrices. xT, a row vcetor, T means transpose of a vector or matrix. (w1 , . 阅读全文
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原文地址:call c++ from python Suppose you have a simple C++ example class you want to talk to in a file called foo.cpp: Since ctypes can only talk to C fu 阅读全文