A data.frame, tibble or sf object of observation data.
type
(optional) The type of geographical detector, which must be one of factor(default),
interaction, risk, ecological. You can run one or more types at one time.
alpha
(optional) Specifies the size of the alpha (confidence level). Default is 0.95.
Jin‐Feng Wang, Xin‐Hu Li, George Christakos, Yi‐Lan Liao, Tin Zhang, XueGu & Xiao‐Ying Zheng (2010)
Geographical Detectors‐Based Health Risk Assessment and its Application in the Neural Tube Defects Study
of the Heshun Region, China, International Journal of Geographical Information Science, 24:1, 107-127,
DOI: 10.1080/13658810802443457