In my various R - Tests I'm using usually the Yahoo Dataservice implemented in quantmod suppressWarnings(try(getSymbols(ticker, index.class="POSIXct", from=initDate, to=to,src="yahoo"),silent=TRUE)) If you would like to run ...

In my various R - Tests I'm using usually the Yahoo Dataservice implemented in quantmod suppressWarnings(try(getSymbols(ticker, index.class="POSIXct", from=initDate, to=to,src="yahoo"),silent=TRUE)) If you would like to run ...

I was wondering about the null distribution of successive differences of random sequences, and decided to do some numerical experiments. I quickly realized that successive differences equates to taking successively higher-order numerical derivatives, ...

In the search for dark matter, I have been having mixed success. It seems that locating DM in single halo skies is a fairly straightforward problem. However, when there are more than one halo, things get quite a bit trickier. As I have advocated many times before, including here and here, simulation can provide deep

Last week I wrote:This is actually a more difficult calculation (or I forgot too much probability). Luckily a bit of brute force comes in handy. To reiterate, in general simulated data shows 0.54 redraws because of the first person etc.colSums(countsto...

It has been just announced that during ESSA2013 conference I am planning to organize a special track on "Statistical analysis of simulation models". I hope to get some presentations using GNU R to promote it in social simulation community.It is obvious that GNU R excels in analysis of simulation data. However, very often it can be neatly...

For a statistical analyst, the first step to start a data analysis project is to import the data into the program and then to screen the descriptive statistics of the data. In python, we can easily do so with pandas package. Tonight, I’d like to add some spice to my python learning experience and do