geographical detector

Usage

geodetector(formula, data, type = "factor", alpha = 0.95)

Arguments

formula: A formula of geographical detector model.
data: A data.frame or tibble of observation data.
type: (optional) The type of geographical detector, which must be one of factor(default), interaction, risk, ecological.
alpha: (optional) Specifies the size of the alpha (confidence level). Default is 0.95.

Value

A list of tibble with the corresponding result under different detector types.

factor: the result of factor detector
interaction: the result of interaction detector
risk: the result of risk detector
ecological: the result of ecological detector

Note

Note that only one type of geodetector is supported at a time in geodetector().

Author

Wenbo Lv lyu.geosocial@gmail.com

Examples

geodetector(y ~ x1 + x2,
   tibble::tibble(y = 1:7,
                  x1 = c('x',rep('y',3),rep('z',3)),
                  x2 = c(rep('a',2),rep('b',2),rep('c',3))))
#> ***          Factor Detector            
#> 
#> | variable | Q-statistic |  P-value   |
#> |:--------:|:-----------:|:----------:|
#> |    x2    |  0.8928571  | 0.03167582 |
#> |    x1    |  0.7714286  | 0.07936477 |

geodetector(y ~ x1 + x2,
   tibble::tibble(y = 1:7,
                  x1 = c('x',rep('y',3),rep('z',3)),
                  x2 = c(rep('a',2),rep('b',2),rep('c',3))),
   type = 'interaction')
#> ***        Interaction Detector         
#> 
#> | Interactive variable |    Interaction    |
#> |:--------------------:|:-----------------:|
#> |       x1 ∩ x2        | Weaken, nonlinear |

geodetector(y ~ x1 + x2,
   tibble::tibble(y = 1:7,
                  x1 = c('x',rep('y',3),rep('z',3)),
                  x2 = c(rep('a',2),rep('b',2),rep('c',3))),
   type = 'risk',alpha = 0.95)
#> ***            Risk Detector            
#> 
#>  Variable x1:
#> 
#> | zone  | zonex | zoney |
#> |:-----:|:-----:|:-----:|
#> | zoney |  No   |  NA   |
#> | zonez |  No   |  Yes  |
#> 
#>  Variable x2:
#> 
#> | zone  | zonea | zoneb |
#> |:-----:|:-----:|:-----:|
#> | zoneb |  No   |  NA   |
#> | zonec |  Yes  |  Yes  |

geodetector(y ~ x1 + x2,
   tibble::tibble(y = 1:7,
                  x1 = c('x',rep('y',3),rep('z',3)),
                  x2 = c(rep('a',2),rep('b',2),rep('c',3))),
   type = 'ecological',alpha = 0.95)
#> ***          Ecological Detector         
#> 
#> |   | x2 |
#> |:--|:--:|
#> |x1 | No |