Distribution of the number of holes after seven years, depending on holeRate sigma. The black line represents a normalised outline histogram showing the density function of the number of holes as counted by Tami and colleagues  in 100 nets. The coloured lines represent the normalised histogram mid-points of the number of holes in simulated nets depending on the holeRate sigma, which is varied over 0.6 (green), 0.8 (blue) and 1.0 (red), with a constant holeRate mean (see above) of 1.8.
Briët et al. Malaria Journal 2012 11:20 doi:10.1186/1475-2875-11-20