# csem_model

##### cSEMModel

cSEMModel

- Keywords
- internal

##### Details

A standardized list containing model-related information. To convert a
a model written in lavaan model syntax
to a cSEMModel list use `parseModel()`

.

##### Value

An object of class cSEMModel is a standardized list containing the following components. J stands for the number of constructs and K for the number of indicators.

`$structural`

A matrix mimicking the structural relationship between constructs. If constructs are only linearly related,

`structural`

is of dimension (J x J) with row- and column names equal to the construct names. If the structural model contains nonlinear relationships`structural`

is (J x (J + J*)) where J* is the number of nonlinear terms. Rows are ordered such that exogenous constructs are always first, followed by constructs that only depend on exogenous constructs and/or previously ordered constructs.`$measurement`

A (J x K) matrix mimicking the measurement/composite relationship between constructs and their related indicators. Rows are in the same order as the matrix

`$structural`

with row names equal to the construct names. The order of the columns is such that`$measurement`

forms a block diagonal matrix.`$error_cor`

A (K x K) matrix mimicking the measurement error correlation relationship. The row and column order is identical to the column order of

`$measurement`

.`$cor_specified`

A matrix indicating the correlation relationships between any variables of the model as specified by the user. Mainly for internal purposes. Note that

`$cor_specified`

may also contain inadmissible correlations such as a correlation between measurement errors indicators and constructs.`$construct_type`

A named vector containing the names of each construct and their respective type ("Common factor" or "Composite").

`$construct_order`

A named vector containing the names of each construct and their respective order ("First order" or "Second order").

`$model_type`

The type of model ("Linear" or "Nonlinear").

`$instruments`

Only if instruments are supplied: a list of structural equations relating endogenous RHS variables to instruments.

`$indicators`

The names of the indicators (i.e., observed variables and/or first-order constructs)

`$cons_exo`

The names of the exogenous constructs of the structural model (i.e., variables that do not appear on the LHS of any structural equation)

`$cons_endo`

The names of the endogenous constructs of the structural model (i.e., variables that appear on the LHS of at least one structural equation)

`$vars_2nd`

The names of the constructs modeled as second orders.

`$vars_attached_to_2nd`

The names of the constructs forming or building a second order construct.

`$vars_not_attached_to_2nd`

The names of the constructs not forming or building a second order construct.

It is possible to supply an incomplete list to `parseModel()`

, resulting
in an incomplete cSEMModel list which can be passed
to all functions that require `.csem_model`

as a mandatory argument. Currently,
only the structural and the measurement matrix are required.
However, specifying an incomplete cSEMModel list may lead to unexpected behavior
and errors. Use with care.

##### See Also

*Documentation reproduced from package cSEM, version 0.1.0, License: GPL-3*