mlr3measures (version 0.4.0)

bias: Bias

Description

Regression measure defined as $$ \frac{1}{n} \sum_{i=1}^n w_i \left( t_i - r_i \right). $$ Good predictions score close to 0.

Usage

bias(truth, response, sample_weights = NULL, ...)

Arguments

truth

(numeric()) True (observed) values. Must have the same length as response.

response

(numeric()) Predicted response values. Must have the same length as truth.

sample_weights

(numeric()) Vector of non-negative and finite sample weights. Must have the same length as truth. The vector gets automatically normalized to sum to one. Defaults to equal sample weights.

...

(any) Additional arguments. Currently ignored.

Value

Performance value as numeric(1).

Meta Information

• Type: "regr"

• Range: \((-\infty, \infty)\)

• Minimize: NA

• Required prediction: response

See Also

Other Regression Measures: ktau(), mae(), mape(), maxae(), maxse(), medae(), medse(), mse(), msle(), pbias(), rae(), rmse(), rmsle(), rrse(), rse(), rsq(), sae(), smape(), srho(), sse()

Examples

# NOT RUN {
set.seed(1)
truth = 1:10
response = truth + rnorm(10)
bias(truth, response)
# }