Create a Product Feature — maxent_product

Creates an interaction feature between two environmental variables: eval(i) = norm(values1[i]) * norm(values2[i]).

Usage

maxent_product_feature(
  values1,
  values2,
  name,
  min1 = NULL,
  max1 = NULL,
  min2 = NULL,
  max2 = NULL
)

values1: Numeric vector for the first environmental variable.
values2: Numeric vector for the second environmental variable (must have the same length as values1).
name: Character string: feature name/identifier.
min1: Minimum of the first variable. If NULL (default), computed as min(values1).
max1: Maximum of the first variable. If NULL (default), computed as max(values1).
min2: Minimum of the second variable. If NULL (default), computed as min(values2).
max2: Maximum of the second variable. If NULL (default), computed as max(values2).

External pointer to a ProductFeature C++ object.

temp <- c(0, 5, 10)
prec <- c(100, 200, 150)
f <- maxent_product_feature(temp, prec, "temp_x_prec")
maxent_feature_eval(f, 2)
#> [1] 0.5