Find all the grid points that are inside of the circle

I have my radius being between 1 and 10 and my angle from 0 to 2pi. I defined an uniform rectangular grid with 10 points (10 by 10) and I want to find how many points fall into the circle. Thanks a lot.

Answer 1

[Star Strider]

Use the inpolygon function.

[Marina Markaki]

But I want the points located inside or on edge of a cricle not a polygonal region. Is this going to work?

[Star Strider]

The inpolygon function can output the points in or on the polygon.

A polygon does not havve any defined shape, other than being a closed boundary, so a circle is a polygon.

It will work. (Since this appears to me to be homework, I did not post the code I wrote to check it to be certain that it does.)

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