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Expand a Compact Pedigree Matrix to Full Dimensions

Source: R/pedmatrix.R
expand_pedmat.Rd

Restores a compact pedmat to its original dimensions by mapping each individual to their family representative's values. For non-compact matrices, returns the matrix unchanged.

Usage

expand_pedmat(x)

Arguments

x

A pedmat object from pedmat.

Value

Matrix or vector with original pedigree dimensions:

  • Matrices: Row and column names set to all individual IDs

  • Vectors (e.g., method="f"): Names set to all individual IDs

The result is not a pedmat object (S3 class stripped).

Details

For compact matrices, full-siblings within the same family will have identical relationship values in the expanded matrix because they shared the same representative during calculation.

See also

pedmat, query_relationship

Examples

tped <- tidyped(small_ped)

# Compact matrix
A_compact <- pedmat(tped, method = "A", compact = TRUE)
dim(A_compact)  # Reduced dimensions
#> [1] 23 23

# Expand to full size
A_full <- expand_pedmat(A_compact)
dim(A_full)  # Original dimensions restored
#> [1] 28 28

# Non-compact matrices are returned unchanged
A <- pedmat(tped, method = "A", compact = FALSE)
A2 <- expand_pedmat(A)
identical(dim(A), dim(A2))  # TRUE
#> [1] TRUE