Extract all possible paths from one variable to another connected component in a latent variable model. In an estimated model the effect size is decomposed into direct, indirect and total effects including approximate standard errors.
# S3 method for lvm path (object, to = NULL, from, all=FALSE, ...) # S3 method for lvmfit effects (object, to, from, ...)
object  Model object ( 

...  Additional arguments to be passed to the low level functions 
to  Outcome variable (string). Alternatively a formula specifying
response and predictor in which case the argument 
from  Response variable (string), not necessarily directly affected by

all  If TRUE all simple paths (in undirected graph) is returned on/off. 
If object
is of class lvmfit
a list with the following
elements is returned
A list where each element defines a possible pathway via a integer vector indicating the index of the visited nodes.
A List of covariance matrices for each path.
A list of parameters estimates for each path
A list where each element defines a possible pathway via a character vector naming the visited nodes in order.
Description of 'comp2'
For a lvmfit
object the parameters estimates and their
corresponding covariance matrix are also returned. The
effects
function additionally calculates the total and indirect
effects with approximate standard errors
children
, parents
Klaus K. Holst
m < lvm(c(y1,y2,y3)~eta) regression(m) < y2~x1 latent(m) < ~eta regression(m) < eta~x1+x2 d < sim(m,500) e < estimate(m,d) path(Model(e),y2~x1)#> [[1]] #> [1] "x1" "y2" #> #> [[2]] #> [1] "x1" "eta" "y2" #>#> [1] "eta" "x1"#> [1] "eta"#> [1] "eta" "y1" "y2" "y3"effects(e,y2~x1)#> Estimate Std.Err z value Pr(>z) #> Total 2.0041 0.06400 31.31 3.111e215 #> Direct 0.9491 0.07118 13.33 1.460e40 #> Indirect 1.0549 0.07285 14.48 1.599e47 #> y2~eta~x1 1.0549 0.07285 14.48 1.599e47 #> #> Estimate 2.5% 97.5% #> Mediation proportion 0.5264 0.4633 0.5895## All simple paths (undirected) path(m,y1~x1,all=TRUE)#> [[1]] #> [1] "x1" "y2" "eta" "y1" #> #> [[2]] #> [1] "x1" "eta" "y1" #>