I want to draw a plot with the points:\
y >= f(x)
where f(x) is some function I define.
Using an x-y plot, I can draw only the function:
y = f(x)
Using an area plot, I can draw an area of a single column (i.e. not y as a function of x).
Is there any way I can fill the area above the x-y curve?
There is (as yet) no way to directly shade y >= f(x)
A work-around is possible with the Area graph by plotting two overlaid graphs.
Graph 1 is f(x), showing a curve of your function. Shade below it with 50% transparency. Colour the line the same colour as the are of Graph 2.
Graph 2 is y=max(x), producing a rectangular block of a different colour reaching up to the highest value of f(x)
Some experimenting with colours and transparency will produce a reasonable shaded graph of y >= f(x)