Subspace In Linear Algebra, linear subspace is also known as vector subspace, which is a subset of a larger vector space. A linear subspace is normally called as subspace when the context serves to distinguish 2022-03-27 Blog Linear Algebra
Run Word-Count Example of Hadoop (Python Version) While Hadoop/MapReduce is based on Java, it is not necessary to use Java to write the mapper and reducer. The Hadoop framework provides the “Streaming API”, which lets us use any command line executab 2022-02-16 Blog Hadoop
Run Word-Count Example of Hadoop (Java Version) The main content of this blog is introducing how to run word count example by Hadoop and Java on the cloud, including set up the Hadoop configuration, generate and adjust the Java code for Hadoop, and 2022-02-15 Blog Hadoop
Show the Hidden File on Mac OS Sometimes we might need to edit the hidden file on Mac such as the configuration file but we don’t know the path of this file. Therefore, letting the computer shows the hidden file allows us to locate 2022-01-29 Blog Mac
Use SSH to connect the virtual machine on cloud and run jupyter notebook on it In this blog, I will introduce how to create a virtual machine on openstack (it’s a cloud platform), and then using SSH to connect the virtual machine with local computer. After the connection, I will 2022-01-21 Blog Virtual Machine
Install and Control Different Version of Python on Mac The default version of Python installed on the Mac OS is 2.7, and if we intall Anaconda, the version 3.7 of Python would overwrite the version 2.7 to become the default version of Python in the comput 2022-01-16 Blog Python
Singular Value Decomposition (SVD) Part 1 Singular Value Decomposition (SVD) is a complex computation in Linear Algebra, and it’s widely used in recommendation system. By SVD, the input user-ratings matrix can be divided into three different 2022-01-14 Blog Linear Algebra
Vector Space In mathematics, vector space is a set of objects that can be operated(added, multipled and so on) together with number A vector space is a triple(V, +, .) and it must obey the following 9 rules: (1) 2021-12-23 Blog Linear Algebra
