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### Path diagrams ###
#
# setMethod("semPaths.S4",signature("lavaan"),function(object,...){
# invisible(semPaths(semPlotModel(object),...))
# })
#
## EXTRACT MODEL ###
semPlotModel_lavaanModel <- function(object, ...)
{
# Check if parTable, otherwise run lavaanify:
if (!is.data.frame(object) & !is.list(object))
{
object <- lavaanify(object, ...)
}
varNames <- lavaanNames(object, type="ov")
factNames <- lavaanNames(object, type="lv")
# rm(Lambda)
factNames <- factNames[!factNames%in%varNames]
# Extract number of variables and factors
n <- length(varNames)
k <- length(factNames)
# Extract parameter names:
if (is.null(object$label)) object$label <- rep("",nrow(object))
semModel <- new("semPlotModel")
# Set estimates to 1 or ustart:
object$est <- ifelse(is.na(object$ustart),1,object$ustart)
if (is.null(object$group)) object$group <- ""
# Create edges dataframe
semModel@Pars <- data.frame(
label = object$label,
lhs = ifelse(object$op=="~"|object$op=="~1",object$rhs,object$lhs),
edge = "--",
rhs = ifelse(object$op=="~"|object$op=="~1",object$lhs,object$rhs),
est = object$est,
std = NA,
group = object$group,
fixed = object$free==0,
par = object$free,
stringsAsFactors=FALSE)
semModel@Pars$edge[object$op=="~~"] <- "<->"
semModel@Pars$edge[object$op=="~*~"] <- "<->"
semModel@Pars$edge[object$op=="~"] <- "~>"
semModel@Pars$edge[object$op=="=~"] <- "->"
semModel@Pars$edge[object$op=="~1"] <- "int"
semModel@Pars$edge[grepl("\\|",object$op)] <- "|"
# Move thresholds to Thresholds slot:
semModel@Thresholds <- semModel@Pars[grepl("\\|",semModel@Pars$edge),-(3:4)]
# Remove thresholds from Pars:
# semModel@Pars <- semModel@Pars[!grepl("\\|",semModel@Pars$edge),]
# Remove weird edges:
semModel@Pars <- semModel@Pars[!object$op%in%c(':=','<','>','==','|','<', '>'),]
semModel@Vars <- data.frame(
name = c(varNames,factNames),
manifest = c(varNames,factNames)%in%varNames,
exogenous = NA,
stringsAsFactors=FALSE)
semModel@ObsCovs <- list()
semModel@ImpCovs <- list()
semModel@Computed <- FALSE
semModel@Original <- list(object)
return(semModel)
}
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