R (programming language)/Tutorials/Plotting
This tutorial demonstrates how to plot data in R.
Note
edit- This stub content was copied from an import of b:R Programming/Tutorial originally to How to use R/Tutorials/Introduction.
Load the data
edit- 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
Plot the data
edit- 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: