Question

Today I want to learn a little bit about the R statistical programming language.

I’m not finding the tutorials to be helpful yet.

I hope to jumpstart this effort with a simple task.

I have 3 x values: 1.5, 2.5, 3.5
and 3 y values: 1.2, 0.1, 4.4

I want to plot a histogram with this data.

q1: What is the least amount of R syntax I can use to plot this historgram?

q2: Can I put the data in myfile.csv and ask R to read myfile.csv and then plot the histogram?

Answer 1

dat <- data.frame(x=c(1.5, 2.5, 3.5), y=c(1.2, 0.1, 4.4))
barplot(dat$y, names.arg=dat$x, ylim=c(0,5))

That will do what you’re after. I think. Labels can be added like so.

barplot(dat$y, names.arg=dat$x, ylim=c(0,5), ylab="blah", xlab="lol")

A histogram has bars touching (continuous x variable), and bar chart/plot doesn’t, strictly speaking, so this may not be what you’re after…