Creates a table of variance components derived from a user-defined covariance matrix.
Arguments
- mat
A symmetric
n x n
positive (semi)-definite variance matrix.- estimate
When
TRUE
(default isFALSE
), the variance components are treated as estimates and sample corrections are applied.
Value
A table which partitions the total variance into main effect and interaction variance,
heterogeneity of variance and lack of correlation, and non-crossover and crossover interaction.
When correction = TRUE
, a sample correction is applied to the variance components.
Examples
# Generate a structured covariance matrix and then measure the partitioning of variance.
diag_mat <- rand_diag_mat(
n = 10
)
cor_mat <- struc_cor_mat(
n = 10,
)
cov_mat <- sqrt(diag_mat) %*% cor_mat %*% sqrt(diag_mat)
measure_variances(
mat = cov_mat
)
#> Component Value Proportion
#> 1 Main effect 0.21469751 0.60715081
#> 2 Interaction 0.13891729 0.39284919
#> 3 Heterogeniety of scale 0.02239313 0.06332633
#> 4 Lack of correlation 0.11652416 0.32952286
#> 5 Non-crossover 0.24240025 0.68549236
#> 6 Crossover 0.11121456 0.31450764
#> 7 Total 0.35361480 1.00000000