With ggplot2 there is a possibility to create divide bars of a histogram into different categories:
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Stacked histogram with ggplot2
Area plots unmasked
RESULTS OF THE GREAT AREA PLOT QUIZ If you are the type of reader who remembers things from last week, you may remember the great area plot quiz we had running. This week, we are excited to announce that the results are in. The plot above shows answers to the four questions. The correct answers
Customizing Maps in R: spplot() and latticeExtra functions
I recently noticed the new latticeExtra page on R-forge, which contains many very interesting demos of new lattice-related functionality. There are strong opinions about the "best" graphics system in R (base graphics, grid graphics, lattice, ggplot, et...
Once again, chart critics and graph gurus welcome
HOW TO DISPLAY A LINE PLOT WITH COUNT INFORMATION? In a previously-mentioned paper Sharad and your DSN editor are writing up, there is the above line plot with points. The area of each point shows the count of observations. It’s done in R with ggplot2 (hooray for Hadley). We generally like this type of plot,
New paper: Survival analysis
Each year I try to carry out some statistical consultancy to give me experience in other areas of statistics and also to provide teaching examples. Last Christmas I was approached by a paediatric consultant from the RVI who wanted to carry out prospective survival analysis. The consultant, Bruce Jaffray, had performed Nissen fundoplication surgery on 
Google AI Challenge: Scores/Rank by Language
A quick follow up to the previous post: about the the scores in the 2010 Google AI competition relative to programming language. The chart above makes each language visible and discrete - and the scales are the same.library(ggplot2)df<- read.c...
Google AI Challenge: Scores/Rank by Language
A quick follow up to the previous post: about the the scores in the 2010 Google AI competition relative to programming language. The chart above makes each language visible and discrete - and the scales are the same.library(ggplot2)df<- read.c...
Electoral Marimekko Plots
To be reductive, visual displays of quantitative information might be reasonably categorized on a continuum between “data display” and “statistical graphics.” By statistical graphics, I mean a plot that displays some summary of or relationship amongst several variables, likely having undergone some processing or analysis. This may be as simple as a scatterplot of a … Read more
Pareto plot party!
A Pareto plot is an enhanced bar chart. It comes in useful for deciding which bars in your bar chart are important. To see this, take a look at some made up DVD sales data. set.seed(1234) dvd_names <- c("Toy Tales 3", "The Dusk Saga: Black Out", "Urban Coitus 2", "Dragon Training for Dummies", "Germination", "Fe 
Root finding
Numerical root finding methods use iteration, producing a sequence of numbers that hopefully converge towards a limits which is a root. In this post, only focus four basic algorithm on root finding, and covers bisection method, fixed point method, Newton-Raphson method, and secant method. Read More: 1886 Words Totally
Zero Inflated Models and Generalized Linear Mixed Models with R.
Zuur, Saveliev, Ieno (2012).
