I've added a twitter search widget that searches for the #rgraphgallery hashtag or the url of the gallery on the front page.

How much predictability is there for these higher moments? Data The data consist of daily returns from the start of 2007 through mid 2011 for almost all of the S&P 500 constituents. Estimates were made over each half year of data. Hence there are 8 pairs of estimates where one estimate immediately follows the other. … Continue reading...

The ability to visualize data, enabled by the advent of graphical computer tools, has been a great boon to Cap and Perf. The power derives from the way graphical displays provide an efficient impedance match to the visual system in our brain. The weakness derives from the way graphical displays provide an efficient impedance match to the visual system...

In this post I will show one way to display explained variance using a line chart. For the best of my knowledge, there is no a default plot for displaying the effect of a factor on the deviance of multilevel models; so this is going to be a tentative for showing such a statistic in my ongoing dissertation. The following...

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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