I've been exploring 2D Plot defaults, Patch and other documentation, as well as Matlab forums for a solution to this problem and have none after 3 months of looking.
I am using line segment data to draw U.S. Census districts of Vermont, thereby creating a map of the state. The ~185 patches that constitute Vermont create a graph that is slightly tilted to the left, as if the 2D drawing is being projected onto a 3D plane. I have the same issue with Delaware data.
Why does Patch(x,y) insist on patching in a tilted manner, even when I go through the Figure window and all signs say it is displaying in 2D?
Edit 1: Using [az,el] = view I get el == 90, meaning my plot is definitely 2D, as described in How to determine if axes are 2D or 3D in Matlab?
