Posts Tagged ‘ R-english ’

Consecutive number and lottery

October 25, 2011
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Consecutive number and lottery

Recently, I have been reading odd things about strategies to win at the lottery. E.g. or I wrote something a long time ago, but maybe it would be better to write another post. First, it is easy to get data on the French lotteries, including dra...

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Short selling, volatility and bubbles

October 17, 2011
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Short selling, volatility and bubbles

Yesterday, I wrote a post (in French) about short-selling in financial market since some journalists claimed that it was well-known that short -selling does increase volatility on financial market. Not only in French speaking journals actually, sin...

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vectorplot in rasterVis

October 2, 2011
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vectorplot in rasterVis

The function slopeAspect from raster provides the vector field (gradient) from a scalar field stored in a RasterLayer object. The magnitude (slope) and direction (aspect) of the vector field is usually displayed with a set of arrows (e.g. quiver in Matlab). rasterVis includes now a method, vectorplot, to calculate and display this vector field

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We keep breaking records ? so what ?… Get statistical perspective….

August 17, 2011
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We keep breaking records ? so what ?… Get statistical perspective….

This summer, we have been told that some financial series broke some records (here, in French) For instance, the French CAC40 had negative return for 11 consecutive days (which has never been seen, so far). > library(tseries)> x<-get....

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PC-Axis with R: pxR

PC-Axis with R: pxR

PC-Axis is a software family consisting of a number of programs for the Windows and Internet environment used to present statistical information. It is used by national and international institutions to publish statistical data. Programs in the PC-Axis family use a particular data file format (see the full PX-Axis data format description). Now the pxR

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1st Data Analysis Contest Using R

1st Data Analysis Contest Using R

Emilio Torres Manzanera has just announced the 1st Data Analysis Contest Using R: “Nestoria (http://www.nestoria.com/) is a specialized web search engine platform in house prices. Nestoria and Lokku Labs aim to improve the understanding of the public of the value of its databases. The company aims to engage a few brilliant statisticians in the expectation

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rasterVis

rasterVis

The raster package defines classes and methods for spatial raster data access and manipulation. The new rasterVis package complements raster providing a set of methods for enhanced visualization and interaction. It is now at CRAN. Several examples can ...

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Population pyramids in R

Some friends asked me about how to built population pyramids with confidence intervals in R. When I did my own probabilistic population projections, I had the same trouble, unfortunately there is no library to do that. So here I share the code I wrote:...

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Raster, CMSAF and solaR

Raster, CMSAF and solaR

The Satellite Application Facility on Climate Monitoring (CMSAF) generates, archives and distributes widely recognised high-quality satellite-derived products and services relevant for climate monitoring in operational mode. The data is freely accesible here after a registration process. I have ask them for several files with monthly averages of global solar radiation over the Iberian Peninsula (download).

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solaR 0.24 at CRAN

solaR 0.24 at CRAN

The version 0.24 of solaR is at CRAN and R-Forge. Some days before the 0.23 version was uploaded, but I had to make a quick fix to readMAPA: the url of http://www.mapa.es/siar has been changed to http://www.marm.es/siar. Moreover, this function has been renamed to readSIAR, although it is still available as readMAPA. Consequently the mode

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