metrica (version 2.1.0)

PAB: Percentage Additive Bias (PAB)

Description

It estimates the contribution of the proportional bias to the Mean Squared Error (MSE) following Correndo et al. (2021).

Usage

PAB(data = NULL, obs, pred, tidy = FALSE, na.rm = TRUE)

Value

an object of class numeric within a list (if tidy = FALSE) or within a data frame (if tidy = TRUE).

Arguments

data

(Optional) argument to call an existing data frame containing the data.

obs

Vector with observed values (numeric).

pred

Vector with predicted values (numeric).

tidy

Logical operator (TRUE/FALSE) to decide the type of return. TRUE returns a data.frame, FALSE returns a list; Default : FALSE.

na.rm

Logic argument to remove rows with missing values (NA). Default is na.rm = TRUE.

Details

The PAB represents contribution of additive bias () component of the MSE. The PAB = 100*((mO-mP)^2/MSE), where mO, and mP represent the mean of observations and predictions, respectively. The greater the value the greater the contribution of additive bias to the prediction error. For the formula and more details, see online-documentation

References

Correndo et al. (2021). Revisiting linear regression to test agreement in continuous predicted-observed datasets. Agric. Syst. 192, 103194. tools:::Rd_expr_doi("10.1016/j.agsy.2021.103194")

Examples

# \donttest{
set.seed(1)
X <- rnorm(n = 100, mean = 0, sd = 10)
Y <- X + rnorm(n=100, mean = 0, sd = 3)
PAB(obs = X, pred = Y)
# }