Is polyarea command related to fill comand?

In the attachment you can find a plot of the data I want to analyze. I used the fill command to color the polygon, which works quite nicely. I want to find the area of colored filling. Does the polyarea command exactly calculate the specified area? Or are there better approximations?

Answer 1

[Sean de Wolski]

Polyarea will calculate the area of the polygon from the vertices. Fill is probably doing a little bit more interpolation, but the areas should match each other closely.