I am working with a model that produces estimates of snow water equivalent through time. Because I deal with large spatial extents, I decided to have the model produce weekly averages. The problem with this is knowing which file to access for a given d...
Monthly Archives: October 2009
Leap years
A quick function that when provided a numeric vector of years returns a boolean vector where TRUE == Leap year.is.leapyear=function(year){ #http://en.wikipedia.org/wiki/Leap_year return(((year %% 4 == 0) & (year %% 100 != 0)) | (year %% 400 == 0))}
Leap years
A quick function that when provided a numeric vector of years returns a boolean vector where TRUE == Leap year.is.leapyear=function(year){ #http://en.wikipedia.org/wiki/Leap_year return(((year %% 4 == 0) & (year %% 100 != 0)) | (year %% 400 == 0))}
Aggreate electoral targeting with R
Aggregate electoral targeting is the process of determining the likely hood of a citizen choosing to vote turnout), and which candidate that person is most likely to vote for (partisan bias) in a given race using historical turnout and partisan bias. The output from this targeting allows a campaign to project the likely number of voters, what percentages their...
ggplot2: Two Color XY-Area Combo Chart
David@Work blog shows how to fill in the area between two crossing lines in an Excel chart. This post was also published as a guest-post on PTS blog. Let’s try to replicate this graph in ggplot2. First, load ggplot2 and generate the data frame to be used in the example (I am using a slightly 
InferenceR looks interesting
I obtained a free academic copy of the InferenceR, which is a R IDE for Windows. I has several interesting features such as a visual debugger. It is definitely worth some further exploration. Of course, the problem (and the only problem for now) is tha...
[, [[, $: R accessors explained
For more than ten years, I have been teaching R both formally and informally. One thing that I find often trips up students is the use of R’s accessors and mutators. ( For those readers not from a formal computer science background, an accessor is a method for accessing data in an object
AlgoCompSynth Reading List
Gerhard Niehaus Algorithmic Composition: Paradigms of Automated Music Generation by Gerhard Nierhaus Iannis Xenakis Formalized Music by Iannis Xenakis Music and Architecture: Architectural Projects, Texts, and Realizations by Iannis Xenakis Harry Partc...
The geese are migrating, and so have I
topsyWidgetPreload({ "url": "http%3A%2F%2Fborasky-research.net%2F2009%2F10%2F20%2Fthe-geese-are-migrating-and-so-have-i%2F", "style": "big", "title": "The geese are migrating, and so have I" }); As someone wiser than I once said, “It’s fall – time to roast footballs and play touch marshmallow.” Or something like that. It’s the time of the year when geese migrate. From somewhere to somewhere else..Somewhere south of where they started.
Zero Inflated Models and Generalized Linear Mixed Models with R.
Zuur, Saveliev, Ieno (2012).
