February 2013

Parallel execution of randomForestSRC

February 13, 2013 | jehrlinger

I guess I’m the resident expert on resampling methods at work. I’ve been using bagged predictors and random forests for a while, and have recently been using the randomForestSRC (RF-SRC) package in R (http://cran.r-project.org/web/packages/randomForestSRC). This package merges the two randomForest… Continue reading → [Read more...]

Large claims, and ratemaking

February 13, 2013 | arthur charpentier

During the course, we have seen that it is natural to assume that not only the individual claims frequency can be explained by some covariates, but individual costs too. Of course, appropriate families should be considered to model the distribution of the cost , given some covariates .Here is the dataset ... [Read more...]

igraph degree distribution: count elements

February 13, 2013 | Richard O. Legendi

Unfortunately, the degree.distribution() function of the igraph library returns the intensities of the distribution:__ g __ plot(g) __ summary(g)IGRAPH U--- 10 10 -- Ring graphattr: name (g/c), mutual (g/x), circular (g/x) So instead of having the number of elements, the density/intensities value is returned:__ degree.distribution(... [Read more...]

Stadium / home team effects in making field goals

February 13, 2013 | dan

We take on a reader question of whether the stadium / home team matters for making a field goal. We pulled up the data on every field goal since 2002 (over 10,000) of them and plotted the probability of scoring as a function of the stadium in which the field goal was kicked. ... [Read more...]

A must-read paper on statistical analysis of experimental data

February 13, 2013 | andrew

Russ Lyons points to an excellent article on statistical experimentation by Ron Kohavi, Alex Deng, Brian Frasca, Roger Longbotham, Toby Walker, Ya Xu, a group of software engineers (I presume) at Microsoft. Kohavi et al. write: Online controlled experiments are often utilized to make data-driven decisions at Amazon, Microsoft . . . deployment ...
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#14 A New GGPLOT Template

February 13, 2013 | wilkinsondarren

  So the opts() has now been given the boot, and all the cool kids are using theme() to customise their ggplots. If you’re still on an old version of R then theme() will still work, but if you update (which you should) then it’ll stop working and you’... [Read more...]

Single Stock Plot Shiny web application

February 12, 2013 | systematicinvestor

Today, I want to share the Single Stock Plot application (code at GitHub). This is the first application in the series of examples (I plan to share 5 examples) that will demonstrate the amazing Shiny framework and Systematic Investor Toolbox to analyze stocks, make back-tests, and create summary reports. The motivation ... [Read more...]

Of Meteorites and Men

February 12, 2013 | Ryan Brown

Hello Paleoposse! My name is Ryan Brown and I’m one of the newest victims bloggers here at the Paleocave. I made an appearance on Episode 134 where I talked a bit about meteorites and the asteroid mining company, Planetary Resources. I blog over at Glacial Till where, confusingly enough, I ... [Read more...]

Another Experiment with R and Sweave

February 12, 2013 | klr

The R package PApages is a great start towards addressing the very common problem of internal and external reporting in the money management industry.  Advent's APX, Axys, and Black Diamond and the up and coming extremely well-connected and well-f... [Read more...]

Review: Kölner R Meeting 6 February 2013

February 12, 2013 | Markus Gesmann

The fourth Cologne R user meeting took place last Wednesday at the Institute of Sociology. Thanks to Bernd Weiß for hosting the event and Revolution Analytics for their sponsorship. We had two fantastic talks by Klaus Jacobi and M.eik Michalke. Klaus talked about Eliminating cloud pixels in satellite images ... [Read more...]

What Analytic Software are People Discussing?

February 12, 2013 | Bob Muenchen

by Robert A. Muenchen How can we measure the popularity or market share of analytic software? One way is to see what people are discussing. I’m in the process of updating my annual article, The Popularity of Data Analysis Software. Below … Continue reading → [Read more...]

R for finance and other upcoming events

February 12, 2013 | Pat

Featured R for Finance Workshop 2013 March 5-6 in London. The target audience are professionals and academics, who wish to learn the basics of the statistical software R and its use in Finance. The workshop is led by Ron Hochreiter, Pat Burns and Michael Sun. Details are on the Unicom website.  ...
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