aspect_importance_single: Aspects importance for single aspects

In triplot: Explaining Correlated Features in Machine Learning Models

Description

Calculates aspect_importance for single aspects (every aspect contains only one feature).

Usage

aspect_importance_single(x, ...)

## S3 method for class 'explainer'
aspect_importance_single(
  x,
  new_observation,
  N = 1000,
  n_var = 0,
  sample_method = "default",
  f = 2,
  ...
)

## Default S3 method:
aspect_importance_single(
  x,
  data,
  predict_function = predict,
  label = class(x)[1],
  new_observation,
  N = 1000,
  n_var = 0,
  sample_method = "default",
  f = 2,
  ...
)

Arguments

x	an explainer created with the DALEX::explain() function or a model to be explained.
...	other parameters
new_observation	selected observation with columns that corresponds to variables used in the model, should be without target variable
N	number of observations to be sampled (with replacement) from data NOTE: Small N may cause unstable results.
n_var	how many non-zero coefficients for lasso fitting, if zero than linear regression is used
sample_method	sampling method in get_sample
f	frequency in in get_sample
data	dataset, it will be extracted from x if it's an explainer NOTE: Target variable shouldn't be present in the data
predict_function	predict function, it will be extracted from x if it's an explainer
label	name of the model. By default it's extracted from the 'class' attribute of the model.

Value

An object of the class 'aspect_importance'. Contains dataframe that describes aspects' importance.

Examples

library("DALEX")
model_titanic_glm <- glm(survived == 1 ~ class + gender + age +
                         sibsp + parch + fare + embarked,
                         data = titanic_imputed,
                         family = "binomial")

explainer_titanic <- explain(model_titanic_glm,
                             data = titanic_imputed[,-8],
                             verbose = FALSE)
aspect_importance_single(explainer_titanic,
                         new_observation = titanic_imputed[1,-8])

triplot documentation built on July 13, 2020, 5:08 p.m.