R (programming language)
From CLAB
The R programming language, sometimes described as GNU S, is a programming language and software environment for statistical computing and graphics.
Tutorials attempted locally:
Tools that use R:
[edit] Links
- http://www.rseek.org/ A customized search engine for R resources.
- R on Wikipedia
- The Little Handbook of Statistical Practice
- From Data to Graphics shows dozens of plot examples.
- Graphical parameters - colors, fonts, legends, etc.
[edit] A Tutorial: Loading and plotting data with R
This tutorial demonstrates how to plot data loaded from files in R.
- Given the data file data.txt located at <path>:
1970 45 63 1980 52 59 1990 59 52 2000 63 45
- This data can easily be loaded into R using the following commands:
setwd("<path>") # change working directory
data <- read.table("data.txt") # load data
- Plotting can then be performed as follows:
# Setup empty plot window
plot(0, type = "n", main = "Plot Title", xlab = "X axis", ylab = "Y axis", xlim = c(1970,2000), ylim = c(0,100))
grid() # add grid
lines(data[,1], data[,2], lty = 1) # draw first dataset
lines(data[,1], data[,3], lty = 2) # draw second dataset
legend("topright", c("first dataset", "second dataset"), lty = c(1, 2) )
- Export of the plot to pdf is easilty performed by adding pdf("filename.pdf") prior to the plotting, and dev.off() after the plotting.
- Export to png can simmilarly be performed by calling png("filename.png") prior to the plotting, and dev.off() after the plotting. png("r_plot.png", width = 420, height = 340) will, for example yield the following figure:
[edit] radial.plot
As root:
install.packages("plotrix", dependencies = TRUE)
Then, to draw a radial plot:
j.sh:
R --no-save -q < j.R convert -rotate 90 Rplots.ps Rplots.png
j.R:
require(plotrix) testlen <- c(sin(seq(0,1.98*pi,length=100))+2+rnorm(100)/10) testpos <- seq(0,1.98*pi,length=100) radial.plot(testlen,testpos,rp.type="p",main="Test Polygon",line.col="blue")
