imcircle

The file develops an "n by n" matrix containing a solid circle of ones of diameter "n" pixels.

The file develops an 'n by n' matrix containing a solid circle of ones of diameter 'n' pixels, over a background of zero pixels.

Pixel positions are calculated on a nearest-fit basis, using trigonometry.

Such a circle can be an image, or part of an image, or an image mask.

A hollow circle (line circle) is also possible.