[R] Manually inserting an extra tick on the y axis in ggplot2

KMNanus kmnanus at gmail.com
Fri Mar 25 15:07:10 CET 2016

I have called geom_hline to insert a horizontal line on the y axis of a plot at a given point.

How can I insert the corresponding tick and its value on the y axis itself?

kmnanus at gmail.com
914-450-0816 (tel)
347-730-4813 (fax)

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