regression. These exercises have been extensively tested with Matlab, but they should also work in Octave, which has been called a “free version of Matlab”. If you are using Octave, be sure to install the Image using gradient descent algorithm, based on which, we can predict the height given a new age value. In Matlab/Octave, you can load the training set using the commands x = load ( ’ ex1x . dat ’ ) ; y = load starting gradient descent, we need to add the x0 = 1 intercept term to every example. To do this in Matlab/Octave, the command is m = length (y ) ; % st or e the number of t r a i n i n g examples x = [

the number of colors it contains. To begin, download data6.zip and unpack its contents into your Matlab/Octave working directory. Photo credit: The bird photo used in this exercise belongs to Frank Wouters you will then use the 16 colors to replace the pixels in the large image. 3 K-means in Matlab/Octave In Matlab/Octave, load the small image into your program with the following command: A = double (

Newton’s Method, we will first plot the data using different symbols to represent the two classes. In Matlab/Octave, you can separate the positive class and the negative class using the find command: % find logistic regression, the hypothesis function is hθ(x) = g(θT x) = 1 1 + e−θT x = P(y = 1 | x; θ) (1) Matlab/Octave does not have a library function for the sigmoid, so you will have to define it yourself.

理，以及精密的运算库。专为进行严格的数字处理而产生。多为很多大 型金融公司使用，以及核心的科学计算组织如：Lawrence Livermore， NASA 用其处理一些本来使用 C++，Fortran 或 Matlab 等所做的任务。 NumPy是什么？ 6 标准的Python中用list（列表）保存值，可以当做数组使用，但因为列表 中的元素可以是任何对象，所以浪费了CPU运算时间和内存。 NumP

Programming problem in α Several off-the-shelf solvers exist to solve such QPs Some examples: quadprog (MATLAB), CVXOPT, CPLEX, IPOPT, etc. Feng Li (SDU) SVM December 28, 2021 34 / 82 SVM: The Solution Once

矢量处理，以及精密的运算库。专为进行严格的数字处理而产生。多为很多大型金融 公司使用，以及核心的科学计算组织如：Lawrence Livermore，NASA用其处理一些 本来使用C++，Fortran或Matlab等所做的任务。 60 Python模块-NumPy 切片 61 Python模块-NumPy 广播 62 Python模块-Pandas ⚫Pandas Pandas 是基于NumPy

ω, α and β satisfy the KKT conditions. We can use several off-the-shelf solvers (e.g., quadprog (MATLAB), CVXOPT, CPLEX, IPOPT, etc.) to solve such a QP problem. Let α∗ be the optimal value of α for the

矢量处理，以及精密的运算库。专为进行严格的数字处理而产生。多为很多大型金融 公司使用，以及核心的科学计算组织如：Lawrence Livermore，NASA用其处理一些 本来使用C++，Fortran或Matlab等所做的任务。 61 Python模块-NumPy 切片 62 Python模块-NumPy 广播 63 Python模块-Pandas ⚫Pandas Pandas 是基于NumPy

[7, 8]], dtype=torch.int32) 根据数据类型的自动识别，转换为 torch.int32 的数据类型。 除了直接声明常量数组的方式，Pytorch 框架还支持类似 Matlab 方式的数组初始化方式，可以定义数组的维度，然后 初始化为零，相关的演示代码如下： c = torch.zeros([2, 4], dtype=torch.float32) print(c)