Workout in a right way

Do you do physical exercises? Do you do it right? :)
Our course project in Practical Machine Learning course https://www.coursera.org/course/predmachlearn was about this topic. Several people put on an accelerometers and performed some exercises the right and the wrong way (consciously). So our task was to build the model to predict whether a person does barbell lifts correctly or incorrectly.
I used Random Forest and Gradient Boosting algorithms. RF has won in a Cross-Validation. Here is my report: http://oleg-davydov.github.io/PML_course_project/course_project.html

Traditionally, many thanks to our instructor Jeff Leek, professor of Johns Hopkins University!

Statistical Inference and Regression Models

That was different! Two new courses in Data Science Specialization on Coursera. Two courses of almost pure mathemathics. Pure pleasure! :) Many thanks to my instructor Brian Caffo, professor of Johns Hopkins University!
Even though these concepts are mostly familiar to me thanks to my alma mater, Moscow State University, it's very useful to see them again in combination with R language.

A project for Reproducible Research

Just finished a big report for the course project. This was a part of Reproducible Research course on Coursera. https://www.coursera.org/course/repdata
The subject of the analysis was the most severe weather events and their consequences with respect to population health and economics.
http://rpubs.com/Oleg_Davydov/56961
A couple of interesting details.
I used generalized Levenshtein distance to handle raw data. Event coding in formal instruction and in real database weren't identical.
One of the tasks was to draw at least one plot. So I've made two US maps of weather events impact on population health and economics.

Machine Learning

Enrolled in Machine Learning course on Coursera.
https://www.coursera.org/learn/machine-learning/
The instructor is Stanford Professor and Coursera founder Andrew Ng! Looking forward for a very fun couple of months :)

R programming

Today I got a certificate of completion of the R programming course, the second course in Coursera Data Science Specialization. https://www.coursera.org/course/rprog
And again, with Distinction, 100% grade! :) Many thanks to the great instructor Roger Peng, professor from Johns Hopkins University!

Coursera Data Science Specialization

Just enrolled in my first online course. It's 'The Data Scientist’s Toolbox', the first part of Coursera's Data Science Specialization. https://www.coursera.org/course/datascitoolbox
Hope to refresh my math skills a little bit and get a closer look at R programming language.

Hello!

Hello All!
This would be a blog about Data Science, User Experience and Web-analytics. My thoughts, ideas and events in my professional life. Thus I'm switching from my Russian blog http://olegdavydov.ru/ to here.
Stay tuned! :)