How can I retrieve the coordinates of polygon vertices in a matrix?

I'm trying to draw a polygon on an image and then retrieve the coordinates of the vertices of the polygon, but I haven't been able to with the getPosition function. My polygon is stored in the variable roi, but when I call getPosition(roi) I get an error that says "Undefined function 'getPosition' for input arguments of the type 'images.roi.Polygon'." What does this mean? Is there a way to store the coordinates of the vertices in a variable?

[Scott MacKenzie]

It might help if you post the code that generates the error.

Answer 1

[Matt J]

Just do roi.Position

[Nathan Shapiro]

Awesome, thank you! Brand new to image processing so I didn't even know that was a function...