"Perceived productivity" is a worthless metric, making plots out of it is just ridiculous. How can you rate your productivity when you were 8 years old? You should know better as a data scientist.<p>That said, I have a 24" screen at home, but I use it mostly for gaming, while most of my programming is done on a 13" mbp.
How do the find the portrait vs landscape orientation works for you? Any change in productivity between the two?<p>I had a team-mate who swore by having one monitor in portrait mode where he kept his word/specs/reading whilst he worked primarily on the landscape monitor. Seemed to work for him.