# Developer documentation: model for covariates on misclassification probabilities

Source:`R/internals_doc.R`

`ecmodel.object.Rd`

A list representing the model for covariates on misclassification probabilities.

## Value

- npars
Number of covariate effect parameters. This is defined as the number of covariates on misclassification (with factors expanded as contrasts) multiplied by the number of allowed misclassifications in the model.

- ndpars
Number of distinct covariate effect parameters, as

`npars`

, but after any equality constraints have been applied.- ncovs
Number of covariates on misclassification, with factors expanded as contrasts.

- constr
List of equality constraints on these covariate effects, as supplied in the

`miscconstraint`

argument to`msm`

.- covlabels
Names / labels of these covariates in the model matrix (see

`model.matrix.msm`

).- inits
Initial values for these covariate effects, as a vector formed from the

`misccovinits`

list supplied to`msm`

.- covmeans
Means of these covariates in the data (excluding data not required to fit the model, such as observations with missing data in other elements or subjects' last observations). This includes means of 0/1 factor contrasts as well as continuous covariates (for historic reasons, which may not be sensible).