evaluate_custom_formula: Safely Evaluate Formula on Bands and Parameters

In GeoIndexR: Computation of Spectral and Geospatial Indices from Multispectral Raster Data

Safely Evaluate Formula on Bands and Parameters

Description

Evaluates a validated AST expression in a controlled, isolated environment containing only the raster/numeric bands, supplied parameters, and safe mathematical operators.

Usage

evaluate_custom_formula(
  parsed_expr,
  band_layers,
  params = list(),
  denominator_tolerance = 1e-06
)

Arguments

parsed_expr	Parsed language expression.
band_layers	Named list of SpatRaster or numeric band values.
params	Named list of numeric parameter constants.
denominator_tolerance	Tolerance for near-zero denominators. Defaults to 1e-6.

Value

A SpatRaster or numeric result.

GeoIndexR documentation built on Oct. 10, 2026, 5:08 p.m.