inpolygon help to find number of integer points

Hi, i've been trying to write a code to find the number of integer set of coordinates (x,y) within a circle. I'm trying to do this on a circle (0,0), radius 4 below. However the code I've made keeps giving me the wrong answer. It'd be much appreciated if anyone could help me on this or correct my code, thanks.

Answer 1

[Torsten]

You only consider points (xq,yq) which have the same x- and y- coordinate.

This will give you a wrong answer.

Use meshgrid to generate all combinations of xq- and yq- coordinates.

Best wishes

Torsten.

[Jenny Briggs]

It works perfectly now. Thank you so much!