Monthly Archives: October 2010

Data plotting, three (or four) ways, part II

Having briefly covered gnuplot for interactive plotting, I'm now going to cover Octave. First, we might ask why anyone would need more than gnuplot. It does, after all, seem relatively powerful, and with a bit of coaxing it can produce reasonably good looking output. Consider, however, the case where you want to do some kind

Data plotting, three (or four) ways, part I

There are a large number of tools one can use to visualize data. I'm comfortable using a few of them, and there are a few more I could use if pressed. I generally separate visualization tools into three categories, based on how close they are to the source of the data we're trying to plot:

How not to present data

One of my students presented some data in our research meeting today, and it did not go well. It was essentially my fault, so I thought I'd take a look at the situation after the fact and try to see how to rehabilitate the presentation. The problem First, the graphs as they were presented: Looking

Termination conditions

One of the projects I'm supervising/working on this year is connected with optimization, and in particular, particle swarm based optimization algorithms. One of the things we've been struggling with is termination conditions, and so I thought I'd write a bit about it to clear my head. Any useful algorithm has to terminate at some point.