Fit local model around the observation: shortcut for DALEX explainer objects

Fit local model around the observation: shortcut for DALEX explainer objects

local_approximation(explainer, observation, target_variable_name,
  n_new_obs, local_model = "regr.lm", select_variables = F,
  predict_type = "response", kernel_type = gaussian_kernel, ...)

Arguments

explainer	a model to be explained, preprocessed by the DALEX::explain function
observation	a new observation for which predictions need to be explained
target_variable_name	name of the response variablea as a character
n_new_obs	Number of observation in the simulated dataset
local_model	Character specyfing mlr learner to be used as a local model
select_variables	If TRUE, variable selection will be performed while fitting the local linear model
predict_type	Argument passed to mlr::makeLearner() argument "predict.type" while fitting the local model. Defaults to "response"
kernel_type	Function which will be used to calculate distances from simulated observation to explained instance
...	Arguments to be passed to sample_locally function

Value

object of class live_explainer. More details in fit_explanation function help.

Examples

# NOT RUN {
data('wine')
library(randomForest)
library(DALEX)
rf <- randomForest(quality~., data = wine)
expl <- explain(rf, wine, wine$quality)
live_expl <- local_approximation(expl, wine[5, ], "quality", 500)
# }