Analyze if a dimension can be safely folded — analyze_dimension

Checks if a parameter's dimension is redundant (values constant across it). Uses per-group validation: for each combination of OTHER dimensions, checks if values are identical within that group.

Usage

analyze_dimension_redundancy(
  param,
  dim_to_test,
  model,
  tolerance = 1e-10,
  validation_mapping = NULL
)

Arguments

param: Parameter object
dim_to_test: Dimension name to analyze
model: Model object (for set membership and alias resolution)
tolerance: Numeric tolerance for value equality (default 1e-10)
validation_mapping: Optional. Name of mapping to use for coverage validation (e.g., "mTechSlice"). If NULL, auto-detects based on parameter dimensions.

Value

List with can_fold (logical) and reason (character)

Details

This is an "all or nothing" approach - if ANY group shows variation, the dimension cannot be folded, as we don't support partial folding.