Hidden Markov Model

The hidden Markov model or HMM for short is a probabilistic sequence model that assigns a label to each unit in a sequence of observations. The model computes a probability distribution over possible sequences of labels and chooses the best label sequence that maximizes the probability of …

Recently I've discovered a dataset online that is a collection of 20M web queries from about 650K users over three months from March 1 to May 31 2006.

The columns are listed as follows:

• User ID - an anonymous user ID number
• Query - the query submitted by the user
• Query Time …

Many people like watching movies, and I do too. Recently I've discovered this somewhat sketchy Korean site that hosts quite a few movies online. I call it sketchy because I almost always see ads asking me to download a piece of software that's supposed to protect my computer from a …

Bon Me is one of my favorite places to grab a quick bite for lunch. Surprisingly I didn't know about its existence until earlier last year despite being so close to my workplace. I really recommend you try miso-braised pulled pork on brown rice without cilantro. It's really addicting.

Anyhow …

Hi there! It's been a little more than a month since my last post. Thanksgiving was two days ago, and I had a good time with my family. How's everyone doing?

With the upcoming Cyber Monday, I'm sure many of you have cool electronics and gadgets in mind to look …

Background

Automatic text summarization is an area of machine learning that has made significant progress over the past years. We read hundreds and thousands of articles either on our desktop, tablet, or mobile devices, and we simply don't have the time to peruse all of them. As such problem of …

an interesting graph

I was going to write part two of the previous post on A/B testing now using Bayesian methods, but I plan to do that in another time since today I'm going to write about clustering, a widely used machine learning technique, specifically clustering Burger King menu …

This is going to be my first post on a topic in data science, and in the next few posts including this one, I will talk about A/B testing, specifically how to do it right using Bayesian methods in comparison with the traditional Frequentist hypothesis testing.

the basic concept …