This function computes the average distance of the next
nearest sample for a given set of coordinates. This method
of sampling is used by the function
when building the spatial accumulation curves
a matrix with n-dimensional coordinates
a vector of average distances for each sequential number of accumulated nearest samples.
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# transect spatial arragnement transect = 1:100 avg_nn_dist(transect) grid = expand.grid(1:10, 1:10) avg_nn_dist(grid) par(mfrow=c(1,2)) plot(avg_nn_dist(transect), type='o', main='transect', xlab='# of samples', ylab='average distance') # 2-D grid spatial arrangement plot(avg_nn_dist(grid), type='o', main='grid', xlab='# of samples', ylab='average distance')
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