CODEWITHSUNDEEP
rplotaxis
rmw
rmw

Reputation: 129

Customizing Y axis values in plot

I am trying to get my graph in R to change it's Y axis values. Code:

plot(tree$NUM,tree$GRA,
     main="YSLOW Grades",
     xlab="HAR #",
     ylab="Grade",
     xaxt="n")
axis(1, at = seq(1, 20, by = 1), las=2)

I have figured out how to customize the x axis, but from all my researching I cannot find a way to simply change the Y axis too. Instead of having numbers, I want to customize the graph so that I can but letter grades in like A,B,C and so on. I assume it's a quick fix to do this but I really am clueless and the material seems lacking on the subject.

To clarify, I do not want to change Y axis label or the spacing, I simply want to be able to but letters on the Y axis, regardless of the data coming into it.

Upvotes: 1

Views: 4311

Answers (1)

Carlos Cinelli
Carlos Cinelli

Reputation: 11597

Just put yaxt = "n" and put the new y labels with axis(2, ....). Example:

plot(1:20,1:20,
     main="YSLOW Grades",
     xlab="HAR #",
     ylab="Grade",
     xaxt="n", 
     yaxt = "n")
axis(1, at = seq(1, 20, by = 1), las=2)
axis(2, at = seq(1, 20, by = 1), label = rep(c("A", "B"), 10), las=2)

enter image description here

Upvotes: 1

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