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Blog Posts

Are Lottery Winning Numbers Really Random?

Posted by Vincent Granville on November 23, 2011 at 8:30pm — 7 Comments

Fake data science

Posted by Vincent Granville on February 11, 2013 at 11:00pm — 6 Comments

200 machine learning and data science resources

Posted by Vincent Granville on December 20, 2014 at 3:30pm

What MapReduce can't do

Posted by Vincent Granville on January 31, 2013 at 10:30pm — 8 Comments

Free book on Excel formulas and VBA macros

Posted by Mark McIlroy on November 18, 2016 at 11:00pm

Regression Analysis using R explained

Posted by suresh kumar Gorakala on December 26, 2014 at 12:43pm — 4 Comments

The 8 worst predictive modeling techniques

Posted by Vincent Granville on September 23, 2012 at 11:00am — 30 Comments

4 open source data mining tools (with GUI)

Posted by Bruno M on April 21, 2009 at 9:30am — 1 Comment

The death of the statistician

Posted by Vincent Granville on August 25, 2013 at 1:00pm — 15 Comments

Linear Algebra for Data Scientists

Posted by Alex Woods on July 10, 2015 at 10:30pm


4 Great Articles Posted This Week

By data science practitioners and rock star data scientists. Designing better algorithms: 5 case studiesIn this article, using a few examples and solutions, I show that the "best" algorithm is many times not what data scientists or management think…Continue

Started by Vincent Granville in Data Mining Software Nov 1.

Logistic Regression: why KS drop a lot after 2 months?

Dear all ,After I set up a logistic regression ,KS =43, but after 2 months,when i tested the new population , KS = 31, what will be the reasons?It is a default model.Continue

Started by FRANK in Data Mining Software Sep 27.

Interesting Math Brain Teaser 1 Reply

We see them all the times, some companies are still using them to hire people - a bad idea in my opinion. Anyway I've found this one posted on Facebook by one of my friends, and supposedly it went viral and was seen more than a million times. I've…Continue

Started by Vincent Granville in Data Mining Software. Last reply by Anand LS Sep 26.

Can you explain this mathematical paradox?

The formula e^{Pi * i) = -1 (see picture below) has been deemed one of the most beautiful mathematical equations, see for example a Quora discussion on the…Continue

Started by Vincent Granville in Data Mining Software Sep 5.

Market Mix Models : Confidence in coefficients

In market mix models, my sales(y) depends on 4 promotions(p1--p4). Let (b11, b21, b31, b41 ) be the coefficients of p1--p4 in one iteration and (b12, b22, b32, b42 ) be the coefficients in the second iteration. I check the validity of the model…Continue

Tags: effects, model, random, attribution, mixed

Started by Raghu Chittari in Business Analytics Jun 19.

Logistic Regression - General concepts

I am relatively new to predictive modeling techniques and would like to get a few concepts cleared/discussed. I am currently in the process of building a logistic regression model using Weight of Evidence (WOE) technique. Here follows some…Continue

Started by Sayantan Bhattacharya in General Technical Questions Jun 27.


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