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 rows and
columns, where
is the number of
non-leaf nodes of the tree and
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