Similar to plotting point symbols, R provides simple ways to adjust the style of lines in graphs.
All you need to try out in this recipe is to run R and type the recipe in the command prompt. You can also choose to save the recipe as a script so that you can use it again later on. We will use the cityrain.csv
data file that we read in the last recipe again.
Line styles can be set using the lty
and lwd
arguments (for the line type and width, respectively) in the plot()
, lines()
, and par()
commands. Let's take our rainfall example and apply different line styles, keeping the color the same:
plot(rain$Tokyo, ylim=c(0,250), main="Monthly Rainfall in major cities", xlab="Month of Year", ylab="Rainfall (mm)", type="l", lty=1, lwd=2) lines(rain$NewYork,lty=2,lwd=2) lines(rain$London,lty=3,lwd=2) lines(rain$Berlin,lty=4,lwd=2) legend("top", legend=c("Tokyo","New York","London","Berlin"), ncol=4, cex=0.8, bty="n", lty=1:4, lwd=2)