ds.mxData: Creates a new MxData object
In datashield/dsMxClient: Datashield package for advanced structural equation modelling

Description Usage Arguments Details Value Author(s) References Examples

This function is similar to OpenMx function mxData.

1 2	ds.mxData(observed = NULL, type = NULL, means = NA, numObs = NA, newobj = "new_mxData", datasources = NULL)

`observed`	a string, the name of a matrix or data.frame which provides data to the MxData object.
`type`	A character string defining the type of data in the 'observed' argument. Must be one of "raw", "cov", "cor", or "sscp".
`means`	An optional vector of means for use when 'type' is "cov", or "cor".
`numObs`	The number of observations in the data supplied in the 'observed' argument. Required unless 'type' equals "raw".
`newobj`	the name of the new variable. By default the name of the new object is "new_mxData".
`datasources`	a list of opal object(s) obtained after login in to opal servers; these objects hold also the data assign to R, as `dataframe`, from opal datasources. By default an internal function looks for 'opal' objects in the environment and sets this parameter.

The same output as the one returned by 'mxData' in the package OpenMx is generated but an empty (all values = NA) dataframe is returned if the output dataframe is not valid according to the DataSHIELD criteria (i.e. if the dataframe has less than the allowed number of observations/rows. If the output dataframe has 0 observations (number of rows = 0), a data fram with one empty row is returned.

a new mxData object.

Gaye, A.

Steven M. Boker, Michael C. Neale, Hermine H. Maes, Michael J. Wilde, Michael Spiegel, Timothy R. Brick, Jeffrey Spies, Ryne Estabrook, Sarah Kenny, Timothy C., Bates, Paras Mehta, and John Fox. (2011) OpenMx: An Open Source Extended Structural Equation Modeling Framework. Psychometrika. Steven M. Boker, Michael C. Neale, Hermine H. Maes, Michael J. Wilde, Michael Spiegel, Timothy R. Brick, Ryne Estabrook, Timothy C. Bates, Paras Mehta, Timo von Oertzen, Ross J. Gore, Michael D. Hunter, Daniel C. Hackett, Julian Karch and Andreas M. Brandmaier. (2012) OpenMx 1.3 User Guide.