Ok, now you can easily implement a Google Visualization API data source on rails. But… are you still using javascript to render them? Well, you don’t need to do that anymore. Now rgviz-rails supports a pretty simple and powerful way to do it. In your views templates you now have an rgviz function. You use [...]

As an intermezzo in the blog posts regarding my thesis, I’d like to point out an unexpected (or at least, unexpected for me) behaviour in Python’s way of constructing default arguments. Suppose we have the following python class MyClass, with an initializer with a default list parameter: class MyClass: def __init__(self, list=[]): self.list = list [...]

So we have this project in Ruby on Rails where we keep track of the amount of infected and death cases of several diseases in cross-border locations. Now we need to do some visualizations with all those reports, like showing the amount of infected cases in each location for a given disease. We analyzed several [...]

Before going into how to solve the partitioned graph coloring problem using integer linear programming (which is the goal of my thesis), I thought it would be a good idea to actually explain what is the partitioned graph coloring problem (or PCP from now on). Graphs and partitions First of all, graphs. Formally, a graph [...]

Despite being able to simply provide a link to wikipedia’s already excellent article on Linear Programming, I wanted to provide a short introduction in order to present what I am doing exactly on my thesis in a future article. Linear Programming is best described as a technique, in which we want to maximize or minimize [...]