This is a subset of my data just so I can learn how to do what I want first. I'm trying to create a bar plot of values from columns and then have a horizontal line representing the average. I was able to create pretty much what I need in Excel but I have very little R experience.
O2 O4 O6 O10 O12 AVG
1 4.72 4.7 4.46 4.25 4.94 4.62