How to calculate number of query points in inpolygon?
Since there are no points lying on the edge of the polygon area, all 80 points identified by xq (in), yq (in) are strictly inside the polygon area. Determine the number of points lying outside the polygon area (not inside or on the edge). Plot the polygon and the query points.
How to find the points in a polygonal region?
Define a square region with a square hole. Specify the vertices of the outer loop in a counterclockwise direction, and specify the vertices for the inner loop in a clockwise direction. Use NaN to separate the coordinates for the outer and inner loops. Define x and y coordinates of 500 random points.
How to tell if a query point is inside a polygon?
Indicator for the points inside or on the edge of the polygon area, returned as a logical array. in is the same size as xq and yq. A logical 1 (true) indicates that the corresponding query point is inside the polygonal region or on the edge of the polygon boundary.
When to use logical 0 in a polygonal region?
A logical 0 ( false ) indicates that the corresponding query point is outside the polygonal region. Therefore, you can use in to index into xq and yq to identify query points of interest.
How to determine the number of points inside a polygon?
Since there are no points lying on the edge of the polygon area, all 80 points identified by xq (in), yq (in) are strictly inside the polygon area. Determine the number of points lying outside the polygon area (not inside or on the edge).
How to generate sample coordinates inside a polygon?
Rejection sampling will take on average 1 ε attempts to generate one sample point inside ε_poly (ε), and 1 ε can be arbitrarily large. Triangulate the polygon and calculate the area of each triangle. Pick the triangle t containing the sample, using random selection weighted by the area of each triangle.