This function generates an image for test purposes. The image is that of a filled circle
at the centre.
Usage
test_image(h = 1, r = 10, n1 = 64, n2 = 64)
Value
List with two elements
z
the test image
signal.grid
the x-y grid in long table format
Arguments
h
amplitude of the filled circle
r
radius of the circle (in pixels)
n1
image height in pixels
n2
image width in pixels
References
Shen, X., Huang, H.-C., and Cressie, N. 'Nonparametric hypothesis testing for a spatial signal.' Journal of the American Statistical Association 97.460 (2002): 1122-1140.