Benjamin

14

Mar

Accuracy versus F score: Machine Learning for the RNA Polymerases

 
Accuracy versus F score: Machine Learning for the RNA Polymerases Introduction Hello, today I'm going to show you the difference of using two different common performance measures (useful not only for Machine Learning purposes, is useful in every scientific field). Until now, I have found...
14

Mar

Upgrade and update R 2.X to R 3.X in Debian Wheezy 7.X

 
Upgrade and update R 2.X to R 3.X in Debian Wheezy 7.X Introduction Following the instructions from CRAN, you need to add the R backports in your source list. FIRST PART: ADD R BACKPORTS: First, open a Terminal and open the sources.list file: $ gksudo gedit /etc/apt/sources.list Then,...
14

Mar

Introduction to Markov Chains and modeling DNA sequences in R

 
Introduction to Markov Chains and modelling DNA sequences in R Introduction Markov chains are probabilistic models which can be used for the modeling of sequences given a probability distribution and then, they are also very useful for the characterization of certain parts of a DNA or protein...
22

Feb

Optimizing a multivariable function parameters using a random method, Genetic Algorithm and Simulated Annealing in R

 
Optimizing a multivariable function parameters using a random method, Genetic Algorithm and Simulated Annealing in R Introduction Say that you are implementing a non-linear regression analysis, which is shortly described by wikipedia as: "In statistics, nonlinear regression is a form of...
22

Feb

Brownian motion simulation in R

 
Brownian motion simulation in R Introduction I have based this post on a very useful piece of code which basically is the core of my own implementation of a Brownian Motion simulation in R. The original reference code Methods According to Wikipedia the mathematical model for Brownian...
22

Feb

To cooperate of defect (besides of coding): Prisoners dilemma, a game theory example in R

 
To cooperate of defect (besides of coding): Prisoners dilemma, a game theory example in R Introduction Hello Computer Science and/or R enthusiasts. This week I had the opportunity to try something that was in my To-Do list a while ago. The idea came almost instantly after reading Dr....
22

Feb

What are the names of the school principals in Mexico?, If your name is Maria, probably this post will interest you. Trends and cool plots from the national education census of Mexico in 2013

 
What are the names of the school principals in Mexico?, If your name is Maria, probably this post will interest you. Trends and cool plots from the national education census of Mexico in 2013 Introduction I will start this post with a disclaimer: The main intention of the post is to show...
21

Feb

100 Prisoners problem, 100 lines of code, a game theory example in R

 
100 Prisoners problem, 100 lines of code, a game theory example in R Introduction was looking for some Game-Theory post in R-bloggers and found this very cool post, obviously I decided to read the post, to look at the code and implement a version of it. As Matt Asher describes in his...
21

Feb

If the typing monkeys have met Mr Markov: probabilities of spelling “omglolbbq” after the digital monkeys have read Dracula

 
If the typing monkeys have met Mr Markov: probabilities of spelling "omglolbbq" after the digital monkeys have read Dracula Introduction The infinite monkey theorem states that a monkey hitting keys at random on a typewriter keyboard for an infinite amount of time will almost surely type a...