Structural Equation Modeling Using the Reticular Action Model (RAM) Notation
Example data set 1
Example data set 2
Example data set 3
Is the input a numeric variable
Convert lavaan output to RAM matrices
Generate all bridges
Make a list of effects
Make a list of spans
Plot the power curve for each specified parameter
Plot the path diagram according to RAM path and bridges or Plot the ve...
Power analysis for bivariate latent change score models
Power analysis for univariate latent change score models
RAM model to lavaan model
Conduct bivariate latent change score analysis
Sobel standard error for a given effect
Fit a model using lavaan based on ram input
Flip the ram path
To be added
Conduct growth curve analysis
Univariate latent change score model
Generate ram matrices based on ram input
lavaan to ram
RAMpath for SEM analysis
Generate path and bridges
Refit a model with additional paths
Internal function
Show the model using Lavvan model syntax
Get the uniques paths
Generate a vector field plot based on the bivariate lcsm
Calculate the total and individual contribution for each path and brid...
We rewrite of RAMpath software developed by John McArdle and Steven Boker as an R package. In addition to performing regular SEM analysis through the R package lavaan, RAMpath has unique features. First, it can generate path diagrams according to a given model. Second, it can display path tracing rules through path diagrams and decompose total effects into their respective direct and indirect effects as well as decompose variance and covariance into individual bridges. Furthermore, RAMpath can fit dynamic system models automatically based on latent change scores and generate vector field plots based upon results obtained from a bivariate dynamic system. Starting version 0.4, RAMpath can conduct power analysis for both univariate and bivariate latent change score models.