gihi.RdCalculate gi and hi local spatial statistic
gihi(x, gi_hi, id, dis, time, alpha = NULL)it is an sf object with the number of events for each spatial unit
Define the local spatial statistic. It includes three options ("gi", "hi", "gi_hi", if "gi" calculates the spatial local statistic getis & ord, if it is "hi" calculates hi, and if it is "gi_hi" calculates both statistic
is or are the identifiers of each spatial unit
it is the prefix of the variable name. Example den_2018 or denv_2018, dis is den and denv
is the unit of time or the time scale of the analyzed time series. example in years, times, months, weeks
is the value of alpha to determine the threshold of value of gi to discriminate hotspots from non-hotspots
a sf object with the ids and the intensity and hotspots for hi, gi or each.
Getis A, Ord JK. 1992. The analysis of spatial association by the use of distance statistics.Geographical Analysis, 24(2):189-206. Ord JK, Getis A. 1995. Local spatial autocorrelation statistics: distributional issues and an application. Geographical Analysis, 27, 286–306. Ord JK, Getis A. 2012. Local spatial heteroscedasticity (LOSH), The Annals of Regional Science, 48 (2), 529–539. Bivand RS, Wong DWS. 2018. Comparing implementations of global and local indicators of spatial association. TEST, 27(3), 716–748.