find_beta_shp: Fits beta from one resolution to another (Shapefile)
In qleclerc/efficientspatial: Efficient Spatial Modelling of Epidemics

Adjusts beta to fit the incidence of one resolution onto another.

1	find_beta_shp(fit_data, shp, interval = 100, num_runs = 500)

`fit_data`	The incidence data to use for fitting.
`interval`	The interval on which the fit should be performed, in days (default is 100 - i.e. the fit will be performed on the first 100 days of the epidemic).
`num_runs`	Number of stochastic runs to extract the median incidence for one beta value (default is 500). Higher values will be longer to run, but yield more accurate results.
`rasterl`	The Rasterlayer to fit on.