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locally explained stratified heterogeneity(LESH) model

Source: R/lesh.R
lesh.Rd

Function for locally explained stratified heterogeneity model.

Usage

lesh(formula, data, cores = 1, ...)

Arguments

formula

A formula of LESH model.

data

A data.frame, tibble or sf object of observation data.

cores

(optional) Positive integer (default is 1). When cores are greater than 1, use multi-core parallel computing.

...

(optional) Other arguments passed to rpart_disc().

Value

A list.

interaction

the interaction result of LESH model

spd_lesh

a tibble of the shap power of determinants

Note

The LESH model requires at least \(2^n-1\) calculations when has \(n\) explanatory variables. When there are more than 10 explanatory variables, carefully consider the computational burden of this model. When there are a large number of explanatory variables, the data dimensionality reduction method can be used to ensure the trade-off between analysis results and calculation speed.

References

Li, Y., Luo, P., Song, Y., Zhang, L., Qu, Y., & Hou, Z. (2023). A locally explained heterogeneity model for examining wetland disparity. International Journal of Digital Earth, 16(2), 4533–4552. https://doi.org/10.1080/17538947.2023.2271883

Author

Wenbo Lv lyu.geosocial@gmail.com

Examples

data('ndvi')
g = lesh(NDVIchange ~ ., data = ndvi)
g
#> ***       Locally Explained Stratified Heterogeneity Model         
#> 
#> |    Interactive variable     |    Interaction     | Variable1 SPD | Variable2 SPD |
#> |:---------------------------:|:------------------:|:-------------:|:-------------:|
#> |    Climatezone ∩ Mining     |    Weaken, uni-    |  0.75353265   |  0.06776285   |
#> |  Climatezone ∩ Tempchange   |    Weaken, uni-    |  0.64437728   |  0.17691822   |
#> | Climatezone ∩ Precipitation |    Enhance, bi-    |  0.39405554   |  0.48986045   |
#> |      Climatezone ∩ GDP      |    Enhance, bi-    |  0.79843017   |  0.05246998   |
#> |  Climatezone ∩ Popdensity   |    Enhance, bi-    |  0.74240657   |  0.11069841   |
#> |     Mining ∩ Tempchange     |    Enhance, bi-    |  0.10161351   |  0.31023743   |
#> |   Mining ∩ Precipitation    |    Weaken, uni-    |  0.05886173   |  0.81368883   |
#> |        Mining ∩ GDP         |    Enhance, bi-    |  0.12735177   |  0.09306564   |
#> |     Mining ∩ Popdensity     |    Enhance, bi-    |  0.13123771   |  0.21760488   |
#> | Tempchange ∩ Precipitation  |    Enhance, bi-    |  0.16187198   |  0.73291613   |
#> |      Tempchange ∩ GDP       | Enhance, nonlinear |  0.35277116   |  0.08443737   |
#> |   Tempchange ∩ Popdensity   |    Enhance, bi-    |  0.28786726   |  0.15633619   |
#> |     Precipitation ∩ GDP     |    Enhance, bi-    |  0.84089496   |  0.04445297   |
#> | Precipitation ∩ Popdensity  |    Enhance, bi-    |  0.79267181   |  0.09507756   |
#> |      GDP ∩ Popdensity       |    Weaken, uni-    |  0.06828443   |  0.15493420   |