This post is a collection of hypothesis test methodologies. The full collection is listed here: http://www.biostathandbook.com/testchoice.html. My post just goes over several hypothesis tests that are relevant to my research. One-way ANOVA: http://www.biostathandbook.com/onewayanova.html If you have one measurement variable and one nominal variable, and the nominal variable separates subjects into multiple groups, you want to test …
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I’ve been scratching my head for a day (06/24/2015) but it ended up that I am still baffled by the concept of Factor Analysis. So first of all, let me list what I’ve learned so far today. PCA and Factor Analysis can be deemed similar from the perspective that they are both dimension reduction technologies. …
Whether you realize or not, fcitx, a popular input method, if not properly uninstalled, can cause the notorious login loop issue on Ubuntu (i.e., every time you type your password and enter, you get asked to type your password again on the same login window). Here is the post talking about how to fully uninstall …
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http://askubuntu.com/questions/280566/my-headphones-mute-alsamixer-when-i-plug-them-in-hp-dv6-12-04 http://askubuntu.com/questions/541847/is-there-any-way-to-save-alsamixer-settings-other-than-alsactl-store The two links above are two popular links about dealing with the auto-mute problem of alsamixer. However, the two don’t help my situation. My solution 1. Type the following command: sudo alsamixer 2. Use `RightArrow` key to navigate to right until you see “auto-mute” 3. Use `UpArrow` or `DownArrow` key to set …
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Long Short Term Memory is claimed to be capable of predicting time series when there are long time lags of unknown sizes between important events. However, as to 2015.6, not many clear tutorials have been found on the Internet. I am going to list a collection of materials I came across. Probably I will write …
http://askubuntu.com/questions/7809/how-to-back-up-my-entire-system
Update 07/15/2015: First, we should know how to calculate covariance matrix and correlation matrix. According to the wikipedia page, we have the calculation procedure of covariance matrix as: And the calculation procedure of correlation matrix is: I am going to use an R example to illustrate the calculation procedures. Let’s say we have a …
For faculty and students: you need to configure exactly as follows (except username & password) to connect NUWave at Northeastern University:
Installing Theano is a pain in the ass if it is on Windows 8.1. Here is the breakdown of how to install it on my Windows 8.1 64bit machine: 1. Install Python 2.7.x: https://www.python.org/downloads/ 2. Install MinGW64: http://sourceforge.net/projects/mingw-w64/. After the installation of MinGW64, add `install_path_to_mingw64/bin` to your `PATH` variable. A caveat is to put the path at …
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I’ve talked about the vanishing gradient problem in one old post in normal multiple layer neural networks. Pascanur et al. (the first in References below) particularly discussed the vanishing gradient problem as well as another type of gradient instable issue, the exploding gradient problem in the scope of recurrent neural network. Let’s recap the …