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ROS Import Python Module From Another Package
Abstract: This will be a fire to go blog. It is really not hard to do this but ROS wiki did a good job in making it hard. Let me guide you through it. There are only TWO things you can do First of all, you need to understand what you can do and then…
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ROS Actionlib: The Generated Messages
Abstract: Knowing how to write an action server is very useful in robot software development. This guidance will focus on explaining the missing part from the official ROS tutorial -- the relation between an action server, and its generated messages.…
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Regular Expression Simple Usage in Python
Abstract: I feel the regular expression is a monster, in both ways. Hard to learn, hard to use. Because the dude who concept this is in the 1950s and at this time everything is very C-style (raw and not beautiful). However, for some reason, I have t…
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Back-propagation in Neural Network, Octave Code
Abstract: This post is targeting those people who have a basic idea of what neural network is but stuck in implement the program due to not being crystal clear about what is happening under the hood. If you are fresh new to Machine Learning, I sugges…
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Change the Username and Hostname on Ubuntu
Abstract: If you didn't give a perfect user name and host name(the computer name), you can change them later. Change the username At the start screen press Ctrl+Alt+F1. Log in using your username and password. Set a password for the "root"…