calc_dist_mat: Calculates the distance matrix (Raster)
In qleclerc/efficientspatial: Efficient Spatial Modelling of Epidemics

Description Usage Arguments Details Value Examples

Calculates the distance between all populated areas in a RasterLayer object.

1	calc_dist_mat(rasterl)

raster_l

The RasterLayer object to use to calculate the distance matrix.

This function calculates the distance matrix once to avoid doing it for every generation during an epidemic simulation. This is essential to later speed up the epidemic simulation. The matrix returned only contains distance between cells with non-NA values (i.e. cells with people in them). Note that this function assumes that the distances are in meters in the dataset! If that is not the case, you might want to either convert these, or adjust the output of this function.

Returns one matrix object containg the distances between all populated areas.

#Create a RasterLayer object:
test_data = raster(nrow=10, ncol=10, xmn=1, xmx=100000, ymn=1, ymx=100000)
values(test_data) = runif(100, 1, 1000)

dist_mat = calc_dist_mat(test_data)