How to add a label to the axis in R?

Question

How can I add a single label to the y-axis of the plot? By default, the plotted labels are e.g. 10, 20, 30, 40 and I'd like to add an extra one such as 18.5 so there will be labels 10, 18.5, 20, 30, 40 in total.

I seek a function like:

append.axis(axis='y', val=18.5)

But I haven't found any. Is it even possible?

function `axis`. there's a lot of example everywhere. – Dec 09 '15 at 11:38 — , Dec 09 '15 at 11:38

stas g · Accepted Answer · 2015-12-09T12:00:50.223

1

e.g.:

 plot(rnorm(100), rnorm(100))
 axis(side = 1, at = 0.5, col.ticks = 'red')

axis is very flexible: you should read up on it (via ?axis in the first instance).

edited Dec 09 '15 at 12:00

answered Dec 09 '15 at 11:52

stas g

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How to add a label to the axis in R?

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