shading graph using gui

Hi! i want to ask on how to shade the area bounded by two lines using gui, the two lines should be user defined that varies depending on a user, should be a parabola, circle, or straight line. please help im doing this for my project and i really dont have any idea on how to code this

im using matlab 2016 version

Answer 1

[Daniel]

It looks like patch should provide what you need. The examples in the documentation for that function provide some nice examples of how to draw different sorts of shapes with it.