Yesterday's
upload of RQuantLib 0.3.0
contained one minor oversight: I had failed to update
src/Makefile.win to the new and enlarged set of source files.
The proper fix (of using wildcards and implicit rules) was simple, and Uwe
Ligges kindly rebuilt RQuantLib on the Windows builder for CRAN using an
updated Makefile so that binaries for Windows will be available. This fix
will also be...
Monthly Archives: September 2009
RQuantLib 0.3.0 Windows build snag
RQuantLib 0.3.0 released
Earlier this evening, I rolled up a new version of RQuantLib. It has been pushed to CRAN and Debian, and source and binary version should appear on the respective mirror networks in due course. This version, the first in a new '0.3.*' release series, ...
RQuantLib 0.3.0 released
Earlier this evening, I rolled up a new version of RQuantLib. It has been pushed to CRAN and Debian, and source and binary version should appear on the respective mirror networks in due course.
This version, the first in a new '0.3.*' release series, contains all the work that Khanh Nguyen did during his Google Summer of Code participation which I had...
Polynomial regression techniques
Suppose we want to create a polynomial that can approximate better the following dataset on the population of a certain Italian city over 10 years. The table summarizes the data:
$$\begin{tabular}{|1|1|}\hline Year & Population\\ \hline 1959&4835\\ 1960&4970\\ 1961&5085\\ 1962&5160\\ 1963&5310\\ 1964&5260\\ 1965&5235\\ 1966&5255\\ 1967&5235\\ 1968&5210\\ 1969&5175\\ \hline \end{tabular}$$
First we import the data into R:
Year Population
Now we create the dataframe...
Polynomial regression techniques
Suppose we want to create a polynomial that can approximate better the following dataset on the population of a certain Italian city over 10 years. The table summarizes the data:
$$\begin{tabular}{|1|1|}\hline Year & Population\\ \hline 1959&4835\\ 1960&4970\\ 1961&5085\\ 1962&5160\\ 1963&5310\\ 1964&5260\\ 1965&5235\\ 1966&5255\\ 1967&5235\\ 1968&5210\\ 1969&5175\\ \hline \end{tabular}$$
First we import the data into R:
Year Population
Now we create the dataframe...
R Flashmob
Today I noticed a call for R users to gather around a single campfire for one hour and share their questions and answers. The campfire name is stackoverflow.com, a site dedicated for handling programming questions. The event details are bellow: From: The R Flashmob Project Subject: R Flashmob #2 You are invited to take part in R Flashmob, the
R Flashmob
Today I noticed a call for R users to gather around a single campfire for one hour and share their questions and answers. The campfire name is stackoverflow.com, a site dedicated for handling programming questions. The event details are bellow: From: ...
ClipPath copies filename and path from windows for loading into R
I wish I would have discovered this long ago. Loading data into R or MySQL requires you to specify the full path to the file. If you do this on a Windows machine there are two annoyances. First, if you save something to your desktop the path to your desktop is really long. Second, windows by default uses backslashes...
Global Sea Surface Temperature Trends (1850-2009)
In this post, I show an R script that downloads the Hadley Centre’s 1850-2009 monthly sea surface temperature (HadSST2) anomaly data, converts the ASCII file into 2 usable R data frames, calculates overall and post 1980 SST anomaly trend rates and develops a 2 panel chart that shows SST anomalies and trend rates and the 
R Flashmob #2
As I said before, I consider the R-Help mailing list an invaluable source of information if you want to get things done in R. Recently the stackoverflow website, a site where programmers can post and answer questions about a wide list of programming la...
Zero Inflated Models and Generalized Linear Mixed Models with R.
Zuur, Saveliev, Ieno (2012).
