Creates a data frame for the drawing of arrows in nested charts, including all correlations between facets that exceed the correlation of the respective tests.
get_xarrows(cors, design)
data frame; data frame in the required format for the drawing of arrows in nested charts, including only those latent facet correlations, that exceed the correlation between the respective tests.
list; list of latent correlation matrices of each model
data frame; each facet (column "facet") is matched with its superordinate test (column "test")