Functions to compute a circular kernel.
smooth_uniform_circle_kernel(r)
hard_uniform_circle_kernel(r)[numeric] Circle radius.
A matrix corresponding to the kernel.
smooth_uniform_circle_kernel(r = 3)
#> [,1] [,2] [,3] [,4] [,5] [,6]
#> [1,] 0.000000000 0.007942803 0.3117253 0.4860527 0.3117253 0.007942803
#> [2,] 0.007942803 0.693194567 1.0000000 1.0000000 1.0000000 0.693194567
#> [3,] 0.311725319 1.000000000 1.0000000 1.0000000 1.0000000 1.000000000
#> [4,] 0.486052659 1.000000000 1.0000000 1.0000000 1.0000000 1.000000000
#> [5,] 0.311725319 1.000000000 1.0000000 1.0000000 1.0000000 1.000000000
#> [6,] 0.007942803 0.693194567 1.0000000 1.0000000 1.0000000 0.693194567
#> [7,] 0.000000000 0.007942803 0.3117253 0.4860527 0.3117253 0.007942803
#> [,7]
#> [1,] 0.000000000
#> [2,] 0.007942803
#> [3,] 0.311725319
#> [4,] 0.486052659
#> [5,] 0.311725319
#> [6,] 0.007942803
#> [7,] 0.000000000
hard_uniform_circle_kernel(r = 3)
#> [,1] [,2] [,3] [,4] [,5] [,6] [,7]
#> [1,] 0 0 0 1 0 0 0
#> [2,] 0 1 1 1 1 1 0
#> [3,] 0 1 1 1 1 1 0
#> [4,] 1 1 1 1 1 1 1
#> [5,] 0 1 1 1 1 1 0
#> [6,] 0 1 1 1 1 1 0
#> [7,] 0 0 0 1 0 0 0