December 2011

Improved Moving Average Code is available for download!

December 7, 2011 | Fotis

Quantitative Finance, Technical Trading & Analysis. Fotis Papailias, Dimitrios Thomakos Fotis Quantitative Finance & Technical Trading Improved Moving Average Code is available for download!Hi everyone, in the last few days we have received great feedback from you. Due to increasing demand we have made a short version of the original code ... [Read more...]

World Since June 2008

December 6, 2011 | klr

For a client meeting, I struggled with how best to illustrate world markets since June 2008.  I used R to produce this, but I’m still not completely satisfied. Anyone have suggestions to improve? From TimelyPortfolio What I thought was inte...
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Judging panel for Applications of R in Business contest

December 6, 2011 | David Smith

Now that the final submissions are in for the Applications of R in Business contest, it's time to announce the judging panel who will select the winners for $20,000 in cash prizes from Revolution Analytics. They are: Edd Dumbill, technologist and writer for O'Reilly Media David Menninger, VP & Research Director at ... [Read more...]

Example 9.17: (much) better pairs plots

December 6, 2011 | Nick Horton

Pairs plots (section 5.1.17) are a useful way of displaying the pairwise relations between variables in a dataset. But the default display is unsatisfactory when the variables aren't all continuous. In this entry, we discuss ways to improve these dis...
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RcppArmadillo 0.2.32

December 5, 2011 | Thinking inside the box

Conrad Sanderson made the official 2.4.0 release of Armadillo last evening. This was wrapped into RcppArmadillo release 0.2.32 which arrived on CRAN earlier today. The NEWS entries summarising the changes since the 2.2.* series, we already saw mos... [Read more...]

Multi-Asset Backtest : Rotational Trading Strategies

December 5, 2011 | systematicinvestor

I want to discuss the implementation of Rotational Trading Strategies using the backtesting library in the Systematic Investor Toolbox.The Rotational Trading strategy switches investment allocations throughout the time, betting on few top ranked assets. For example, the ranking can be based on relative strength or momentum. A few examples ... [Read more...]

My Favorite Graphs

December 5, 2011 | Nina Zumel

The important criterion for a graph is not simply how fast we can see a result; rather it is whether through the use of the graph we can see something that would have been harder to see otherwise or that could not have been seen at all. – William Cleveland, The ... [Read more...]

PCA file calculation with "R".

December 5, 2011 | jrcuesta

X es la matriz centrada (X is the centered matrix). Xcov es la matriz de covarianzas de X (Xcov is the covariance matrix of X).Con la función "eigen" calculamos los "eigenvectors" y "eigenvalues" de Xcov.(With the function "eigen" we calculate the "ei...
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Decimal to Binary in "R"

December 5, 2011 | Alvaro "Blag" Tejada Galindo

Lately...I've been learning "R"...that weird programming language aimed for Statistics and Statistical programming...and I really like it...so as usual, I needed to create my own Decimal to Binary application -;)binary bsum bexp while (p_number __ 0) { digit p_number bsum bexp } return(bsum)}p_numberp_numberbsumcat("... [Read more...]

Vote Compass: visualizing Canadian poll results with R

December 5, 2011 | David Smith

Vote Compass is an online "electoral literacy application, whose goal is to encourage engagement with and stimulate discussion around the policy platforms of Canada's political parties. In the lead-up to the 2011 Canadian election, Vote Compass collected the results of an on-line 10-minute survey from more than 2 million participants, and used ... [Read more...]

International Open Data Hackathon

December 5, 2011 | Christopher Bare

This past Saturday, I hung out at the Seattle branch of the International Open Data Hackathon. The event was hosted at the Pioneer Square office of Socrata, a small company that helps governments provide public open data. A pair of data analysts from Tableau were showing off a visualization for ... [Read more...]

A pure R poker hand evaluator

December 5, 2011 | Zach Mayer

There's already a lot of great posts out there about poker hand evaluators, so I'll keep this short.  Kenneth J. Shackleton recently released a very slick 5-card and 7-card poker hand evaluator called SpecialK.  This evaluator is li...
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