Lab 3: Barplots, Fisher's Exact Test, and For-Loop Review

We can draw additional stuff on the plot using the bp values we received. We can draw error bars using arrows.

Everything should be a 2 x 2 matrix so things line up properly. If you have errors, check your data!

• (x0, y0) is the start coordinate.
• (x1, y1) is the end coordinate.
• angle controls the angle of the arrow heads: a normal arrow would be closer to 30 degrees, perhaps. If you set it to 90 degrees, it stops looking like an arrow and starts looking like an error bar!
• code = 3 says to plot an arrow like ⟷ and not an arrow like ⟶ or ⟵.
• length = 0.1 controls how big the arrow heads are.
• col = "salmon" makes them salmon. A lot of color names are accepted as well as RGB hex codes if you want to get creative!