This problem is looking for the number of vertices on the hexagonal grid inside the circle of radius r. The center of the hexagon is not counted as a point for this problem, and this is true for every hexagon inside the circle.
Summing Digits within Text
Matrix indexing with two vectors of indices
Determine Whether an array is empty
Reindex a vector
Volume of a Simplex
Shifted Hexagonal Tiling Dots in a Circle
Dots in a Diamond
Chebyshev polynomials of the 2nd Kind
Find the treasures in MATLAB Central and discover how the community can help you!
Choose a web site to get translated content where available and see local events and offers. Based on your location, we recommend that you select: .
You can also select a web site from the following list:
Select the China site (in Chinese or English) for best site performance. Other MathWorks country sites are not optimized for visits from your location.
Contact your local office