| getParDiffTree {semtree} | R Documentation |
Return table with parameter differences of a tree
Description
Returns a table with some measure of parameter differences between post-split nodes.
Usage
getParDiffTree(tree, measure = "wald", normalize = FALSE)
Arguments
tree |
a semtree object. |
measure |
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. |
normalize |
logical value; if TRUE parameter differences of each split are divided by sum of all differences the corresponding split. Set to FALSE by default. |
Value
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.
Author(s)
Manuel Arnold