The Kaufman Decimals

In his brilliant post (read it!), Ben Orlin introduced Kaufman decimals as follows, if

0.(4) = 0.444444444444444444444444444444444444444....,

is a number where the fourths go on forever, then

0.(4)1 = 0.44444444444444444444444444444444444444....1,

is a number where the fourths go on forever and, afterwards, there’s a one.

Imagine writing the number 0.(4)1 into a grid. You fill the first line with fourths and then write "1" into the second line like this

Facebook brainstorming

THIS POST IS OBSOLETE, SEE RFACEBOOK PACKAGE, MANY THANKS TO ITS DEVELOPERS

This blog has been sleeping for a long time. I moved from Prague (Czech Rep.) to Bar Harbor (Maine, US) and spent the last month doing paper work and settling down.

I am glad to note that Mining Facebook Data: Most "Liked" Status and Friendship Network was the 56th most read post on R-bloggers last year and its coverage on Revolution Analytics' blog Visualize your Facebook friends network with R made it to Top 10 most popular 2012 posts. Hope, one day my research papers will receive the same level of publicity.

Meanwhile, I think about other low-hanging fruits:

• Quantify who "likes" your posts most, use it as a distance in the Friendship Network
• Based on TED Talks that you liked in past, predict whether you will like next one (instead of TED Talks, one can look for movies or anything similar)
• Automatic birthday wish posting

Any other idea? I will implement one or two of those and post here the codes.