ps_index: Parameter Stability Index

In nietsnel/psindex: Parameter Stability Index

Description

A function used to calculate fungible parameter estimates.

Usage

ps_index(model = NULL, data_set = NULL, group = NULL,
  RMSEA_pert = 0, meanstructure = NULL, genanneal_max_iters = 100,
  plot_fpe = FALSE, output_long = FALSE, frac_plot = 1,
  iterations_bin = 40000, suppress_message = FALSE,
  control_genSA = NULL, index_method = "rmsea", lower = -10,
  upper = 10, starting_val_MLE = FALSE, dev_options = NULL)

Arguments

model	user-specified SEM that using lavaan syntax.
data_set	data frame of measured variables.
RMSEA_pert	numeric. Defines the maximum size of the perturbation in data-model fit (in the scale of RMSEA). For example, a RMSEA_pert = .01 indicates that all estimates will be stored that have a RMSEA value within .01 RMSEA of the MLE RMSEA value.
genanneal_max_iters	integer. The maximum number of iterations of the simulated annealing algorithm.
plot_fpe	a logical value indicating whether FPEs should be graphed alongside the maximum likelihood estimates. Defaults to FALSE.
output_long	a logical value that indicates whether the FPEs and the MLE should be output in long data format. Defaults to FALSE
frac_plot	the fraction of FPEs that are graphed. Defaults to 1.
iterations_bin	numeric. Represents the maximum number of fungible estimates that can be stored. Defaults to 40,000
control_genSA	list. used to control the simulated annealing algorithm (see GenSA documentation)
index_method	Character. Specify the index used to calculate FPEs. Either RMSEA or AIC. Defaults to RMSEA
lower	Numeric. Lower bound of the parameter search space to be optimized over. Defaults to -10
upper	Numeric. Upper bound of the parameter search space to be optimized over. Defaults to 10
starting_val_MLE	a logical value indicating whether the MLEs should be used as starting values for the SA algorithm. Defaults to FALSE
dev_options	list. used to control special functions. not for regular usage.

Author(s)

Jordan Yee Prendez, [e-mail]

Examples

## Not run: 
model <- '
measurement model
ind60 =~ x1 + x2 + x3
dem60 =~ y1 + y2 + y3 + y4
dem65 =~ y5 + y6 + y7 + y8
# regressions
dem60 ~ ind60
dem65 ~ ind60 + dem60
# residual correlations
y1 ~~ y5
y2 ~~ y4 + y6
y3 ~~ y7
y4 ~~ y8
y6 ~~ y8
'
ps_index(model = model, data_set = PoliticalDemocracy,
        RMSEA_pert = .01,
        plot_fpe   = TRUE,
        index_method = "rmsea",
       frac_plot = .3, iterations_bin = 100000,
        control_genSA = list(maxit = 500))

## End(Not run)

nietsnel/psindex documentation built on June 22, 2019, 10:56 p.m.