inst/models/passing/ModelIndexErrorChecking.R

In OpenMx/OpenMx: Extended Structural Equation Modelling

#
#   Copyright 2007-2018 by the individuals mentioned in the source code history
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#   Licensed under the Apache License, Version 2.0 (the "License");
#   you may not use this file except in compliance with the License.
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#        http://www.apache.org/licenses/LICENSE-2.0
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require(OpenMx)
foo <- mxModel('foo')
msg <- paste("The argument to the",
	"'$' or '[' operator applied on a MxModel",
	"object must be a single character string")
omxCheckError(foo[[1]], msg)
omxCheckError(foo[[TRUE]], msg)
suppressWarnings(omxCheckIdentical(foo[[NULL]], NULL))