How to add axis labels for individual entries in the Y-axis using plot() in R

Question

I am plotting a series of time intervals against a character vector of a length of 130. Currently, the y-axis labels are numbered from 0-120 by 20s.

Is there a way to replace the numbered y-axis labels with text labels that show what variety corresponds to what time interval?

Here is an image of the plot I'm describing as it currently is:

Answer 1

You can plot without the labels and then add your custom labels.

plot(1:3,  yaxt = "n")
axis(side = 2, at = 1:3, labels = c("a","b", "c"))