2636 search results for "GIS"

My Favorite Graphs

December 5, 2011
By
My Favorite Graphs

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 Elements of Graphing Data, Related posts:

Read more »

A pure R poker hand evaluator

December 5, 2011
By
A pure R poker hand evaluator

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...

Read more »

From datasets to algorithms in R

December 5, 2011
By

Many statistical algorithms are taught and implemented in terms of linear algebra. Statistical packages often borrow heavily from optimized linear algebra libraries such as LINPACK, LAPACK, or BLAS. When implementing these algorithms in systems such as Octave or MATLAB, it is up to you to translate the data from the use case terms (factors, categories, numerical variables)...

Read more »

Improved Moving Average?

December 4, 2011
By
Improved Moving Average?

When @quantfblog started following me on Twitter, I was delighted to discover their papers Papailias, Fotis and Thomakos, Dimitrios D., An Improved Moving Average Technical Trading Rule (September 11, 2011). Available at SSRN: http://ssrn.com/abstract...

Read more »

On the (statistical) road, workshops and R

December 3, 2011
By
On the (statistical) road, workshops and R

Things have been a bit quiet at Quantum Forest during the last ten days. Last Monday (Sunday for most readers) I flew to Australia to attend a couple of one-day workshops; one on spatial analysis (in Sydney) and another one … Continue reading →

Read more »

Working with Wisconsin Voter Data in Access 2007; Analysis with R.

December 2, 2011
By

Computer Assisted Reporting This technical note describes manipulation/analysis of Wisconsin voter registration data from June 2011. Wisconsin voter registration data can be purchased from the Wisconsin Government Accountability Board for $12,500, whic...

Read more »

Is Drawdown the Biggest Determinant of System Success?

December 1, 2011
By
Is Drawdown the Biggest Determinant of System Success?

In all my system development, I still have not been able to determine what universal underlying conditions significantly improve a system’s chances of outperforming buy-and-hold.  Also, I have found very little discussion, so maybe R with some h...

Read more »

Fitting distributions with R

December 1, 2011
By
Fitting distributions with R

Fitting distribution with R is something I have to do once in a while.A good starting point to learn more about distribution fitting with R is Vito Ricci's tutorial on CRAN. I also find the vignettes of the actuar and fitdistrplus packag...

Read more »

Free ggplot2 webinar from Hadley Wickham

November 30, 2011
By

The Orange County R Users Group is hosting a free webinar presented by Hadley Wickham, author of the ggplot2 graphics package for R. The webinar, "Advanced Visualizations in R with Hadley Wickham" is live from 6PM-7PM Pacific Time tomorrow, December 1. You can register at the LinkedIn event page below, as long as there are spaces left (it's limited...

Read more »

Course: Financial Data Modeling and Analysis in R

November 28, 2011
By

The University of Washington is holding a web-based course which will be of interest to anyone who wants to learn about financial modeling with R: Financial Data Modeling and Analysis in R (AMATH 542) is a comprehensive introduction to the R statistical programming language for computational finance offered by the University of Washington Computational Finance program and taught by...

Read more »