Ken Rice and Thomas Lumley will give a course on advanced R programming in two locations this summer. 1. In Edinburgh, June 13-15 (the week before the International Conference in Quantitative Genetics). See http://www.eisg2012.org.uk/ 2. In Seattle, July 23-25, as part of the Summer Institute in Statistical Genetics. See http://www.biostat.washington.edu/suminst/sisg/general The course is about 60% lecture and 40% lab session (BYO R),...
Monthly Archives: February 2012
Analytic applications are built by data scientists
Ventana Research analyst David Menninger was on the judging panel for the Applications of R in Business contest. In a post on the Ventana research blog, he offers his perspectives on the contest, noting that R, as a statistical package, includes many algorithms for predictive analytics, including regression, clustering, classification, text mining and other techniques. The contest submissions supported...
Cochran Q Test for k related samples in R
To run the Cochran Q Test in R, we need to download the package of it first, since it is not built-in in R. The name of the package is RVAideMemoire authored by Maxime Hervé. Here's how to do it.Codes:Here we are installing the package named RVAideMem...
Transformation of Several Variables in a Dataframe
This is how I transform several columns of a dataframe, i.e., with count-data into binary coded data (this would apply also for any other conversion..).count1
Vectorized R vs Rcpp
In my previous post, I tried to show, that Rcpp is 1000 faster than pure R and that generated the fuss in the comments. Being lazy, I didn’t vectorize R code and at the end I was comparing apples vs oranges. To fix that problem, I built a new script, where I’m trying to compare
Are Recessions Environmentally Beneficial?
Description:Total energy consumption in the United States by sector. Vertical gray lines represent periodsof recession.Data:http://www.eia.gov/totalenergy/data/annual/index.cfm#consumptionhttp://en.wikipedia.org/wiki/List_of_recessions_in_the_Uni...
MAT886 mean excess function (and reinsurance)
Tomorrow, in the course on extreme value, we will focus on applications. We will discuss reinsurance pricing. Consider a random variable , a threshold and define the mean excess function. This function is known in life insurance as the average ...
"R": Looking at the Data (Gasoline) – 001
As other softwares "R" has nice tools to look to the data before to develop the calibration.
Statistics for the "Y" variable (in this case octane number) like Maximun, Minimun,..,standard deviation,...are important:
> library(ChemometricsWithR)
> data(gasoline)
> summary(gasoline$octane)
Min. 1st Qu. Median Mean 3rd Qu. Max.
83.40 85.88 87.75 87.18 88.45 89.60
> sd(gasoline$octane)
1.530078
And of course the Histogram:> hist(gasoline$octane)
Confirming SSR, SSE, and SST using matrix in R
The codes below was done in our regression laboratory class. Here, we run first the data in SPSS, and take the ANOVA output where we can find the computed values of SSR, SSE, and SST.ANOVAb Model Sum of Squares df Mean Square F Sig. 1 Regress...
R Training Course in the Bay Area
An introduction to R for sofware developers and data analysts Saturday March 10th, 2012 8:30-5:00pm EBay 2161 North 1st Street San Jose, California I will be presenting a one day professional development workshop on R programming for software developers and … Continue reading →
Zero Inflated Models and Generalized Linear Mixed Models with R.
Zuur, Saveliev, Ieno (2012).
