Returns a table with some measure of parameter differences between post-split nodes.
getParDiffTree(tree, measure = "wald", normalize = FALSE)a semtree object.
a character. "wald" (default) gives the squared parameter differences divided by their pooled standard errors. "test" gives the contributions of the parameters to the test statistic."raw" gives the absolute values of the parameter differences.
logical value; if TRUE parameter differences of each split are divided by sum of all differences the corresponding split. Set to FALSE by default.
A matrix containing parameter differences. The
matrix has \(n\) rows and \(k\) columns, where \(n\) is the number of
non-leaf nodes of the tree and \(k\) is the number of model parameters. The
rows are named by the node IDs as given getNodeById and the columns
are named as in coef.