Entries by Przemyslaw Biecek

Exploration of data from iPhone motion coprocessor (2)

Exploration of data from iPhone motion coprocessor (2)

Last week we have downloaded and loaded into R data from fitness tracker (motion coprocessor in iphone). Then with just few lines of R code we decomposed the data into a seasonal weekly component and the trend. Today we are going to see how to plot the number of steps per hour for different days of week. And then same data will be used to check how often there was any activity at given time.

Hack the Proton

Hack the Proton

I’ve prepared a short console-based data-driven R game named ,,The Proton Game’’ or ,,Hack the Proton” (still cannot decide which name is better). The goal of a player is to play the hacker and infiltrate Slawomir Pietraszko’s account on a Proton server. To do this, you have to solve four data-based puzzles.

R vs SAS vs SPSS

R vs SAS vs SPSS

Today we are going to illustrate some subtle differences among three statistical packages, R/SAS/SPSS. Small differences, but sometimes even a very small difference may have large consequences. So it is worth to know such things.

Data mining of the votes of Members of Parliament

Data mining of the votes of Members of Parliament

7th term of the Sejm has already come to its end. It would be nice to see how have the Members of Polish Parliament voted for these last 4 years! In total they took part in over 6000 votings. Did the representatives of the same clubs voted more similarly to each other? Did the Members of Polish Parliament who changed the clubs they belonged to voted in a different way than the Members of Parliament from their former clubs? Let’s see!

Statistician like a shoemaker

Statistician like a shoemaker

Children bring from school strange home assignments, like for example a question: What is your dad’s job similar to? After several hits (a cosmonaut, Formula 1 driver, firefighter) it turns out that the work performed by a statistician is very much similar to the work of a shoemaker. Why?