Epidemics were generated using the stochastic simulator from Xu and Madden (2004). The data consist of the numbers of diseased plants per sampling unit (out of a total of n = 100 plants in each sampling unit). N = 144 sampling units, and different values for the parameters pattern and mu were used for the simulations.

simulated_epidemics

Format

A data frame with 864 rows and 6 variables:

[, 1]patternEither clumped (i.e. aggregated), random or regular.
[, 2]muMedian spore dispersal parameter.
[, 3:4]x,yGrid spatial coordinates.
[, 5]iNumber of diseased plants (from 0 to 100).
[, 6]nSampling unit size. Here, n = 100 plants per sampling unit.

Source

Xu XM, Madden LV. 2004. Use of SADIE statistics to study spatial dynamics of plant disease epidemics. Plant Pathology 53, 38–49. doi:10.1111/j.1365-3059.2004.00949.x