Coursera Machine Learning second week quiz answer-Alibaba Cloud

这篇博客主要解答了Coursera机器学习课程第二周关于Octave/Matlab的测验问题,涉及矩阵运算、索引表达式、向量化代码实现等知识点。通过实例解析了如何正确执行矩阵乘法、索引选择以及向量化的高效计算方法。

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Octave Tutorial

5 Questions


1. Suppose I first execute the following Octave commands:

A = [1 2; 3 4; 5 6];

B = [1 2 3; 4 5 6];

Which of the following are then valid Octave commands? Check all that apply and assume all options are written in an Octave command. (Hint: A ‘sign the transpose of A.)

0.29926222492940724

C = A * B;

0.6644976132083684

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