Visualizing Walking Using Smartphone Accelerometers

Really cool visualization based on UCI Machine Learning Repository datasets:
http://kyrandale.com/viz/d3-smartphone-walking.html

Algorithm choosing

We have a lot of algorithms. 
Great schema, which working not only for scikit, provide a simple decision process:

Image source

Helping Santa's Helpers Kaggle Competition

You can help elves in Santa Workshop pack toys in most efficient way and win $20,000.
Only 40 days left!
More about  compettition: http://www.kaggle.com/c/helping-santas-helpers

What is Spark?

Here you can read a bit old, but great article from IBM Developers.

Plotting multiple graphs on one page

R + ggplot2 is my favourite tools for building plots.
Today I need to have few graphs on one page.
Solution was found.

You can easily build plots, like that:

Coursera: Mining Massive Datasets

Extremely useful course for data scientist  - Mining Massive Datasets by by Jure Leskovec, Anand Rajaraman and Jeff Ullman.

Course Syllabus

Week 1:
MapReduce
Link Analysis -- PageRank

Week 2:
Locality-Sensitive Hashing -- Basics + Applications
Distance Measures
Nearest Neighbors
Frequent Itemsets

Week 3:
Data Stream Mining
Analysis of Large Graphs

Week 4:
Recommender Systems
Dimensionality Reduction

Week 5:
Clustering
Computational Advertising

Week 6:
Support-Vector Machines
Decision Trees
MapReduce Algorithms

Week 7:
More About Link Analysis --  Topic-specific PageRank, Link Spam.
More About Locality-Sensitive Hashing

In addition, you can buy or download for free Mining Massive Datasets book from Mining Massive Datasets web-page .

Updating R on Ubuntu

[Tested on Ubuntu 14.04 and R 3.1.1, old R version 3.0.2]

 sudo add-apt-repository ppa:marutter/rrutter  
 sudo apt-get update  
 sudo apt-get upgrade  
 sudo apt-get install r-base r-base-dev  

How to became a data scientists?

Coursera offers two specialization, which can help you:

• Data science by Johns Hopkins University (9 courses )
• Data mining by University of Illinois (5 courses)

Data Scientists Demand

Here you can see Data Scientist position demand according to job site indeed.com:

"Data Scientist" Job Trends

"data Scientist" jobs

Data Science and Great Career

Hello, my dear diary.
Today I found awesome presentation about way to success in Data Science.

The Science of a Great Career in Data Science from Kate Matsudaira

"Hello world" post

Hello, my dear diary.
Here I am going to describe my daily routine as a data scientist.