ramModel | R Documentation |

This function creates a 'semPlotModel' object using matrices of the RAM model (McArdle & McDonald, 1984).

ramModel(A, S, F, M, manNames, latNames, Names, ObsCovs, ImpCovs, modelLabels = FALSE)

`A` |
Specification of the assymmetric (A) matrix, see details. |

`S` |
Specification of the symmetric (S) matrix, see details. |

`F` |
Specification of the filter (F) matrix, see details. |

`M` |
Specification of the means (M) vector, see details. |

`manNames` |
Character vector of the manifest names. |

`latNames` |
Character vector of the latent names. |

`Names` |
Character vector containing all names. Defaults to |

`ObsCovs` |
Observed covariancem matrix. |

`ImpCovs` |
Implied covariancem matrix. |

`modelLabels` |
Logical. If |

The matrices can be assigned in various ways, depending on the amount of information that should be stored in the resulting model.

First, the a single matrix can be used. The values of this matrix correspond to the parameter estimates in the 'semPlotModel'. For multiple groups, a list of such matrices can be used.

to store more information, a named list of multiple matrices of the same dimensions can be used. Included in this list can be the following (but only estimates is nessesary):

`est`

Parameter estimates

`std`

standardized parameter estimates

`par`

Parameter numbers. 0 indicating fixed variables and parameters with the same parameter number are constrained to be equal.

`fixed`

Logical matrix indicating if the parameter is fixed.

If `std`

is missing the function tries to compute standardized solutions (not yet working for intercepts). If `fixed`

is missing it is computed from the `par`

matrix. For multiple groups, a list containing such lists can be used.

The number of variables is extracted from the assigned matrices.

A 'semPlotModel' object.

Sacha Epskamp <mail@sachaepskamp.com>

McArdle, J. J., & McDonald, R. P. (1984). Some algebraic properties of the reticular action model for moment structures. British Journal of Mathematical and Statistical Psychology, 37(2), 234-251.

`semPlotModel`

`semCors`

`semPaths`

`lisrelModel`

Embedding an R snippet on your website

Add the following code to your website.

For more information on customizing the embed code, read Embedding Snippets.