inst/models/passing/startingValues.R

In OpenMx: Extended Structural Equation Modelling

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library(OpenMx)
library(testthat)

covMatrix <- matrix( c(0.77642931, 0.39590663, 0.39590663, 0.49115615), 
	nrow = 2, ncol = 2, byrow = TRUE, dimnames = list(c('a','b'), c('a','b')))

model <- mxModel("missingtest",
	   mxMatrix("Full", values = c(0,0.2,0,0), name="A", nrow=2, ncol=2),
	   mxMatrix("Symm", values = c(0.8,0,0,0.8), name="S", nrow=2, ncol=2, free=TRUE),
	   mxMatrix("Iden", name="F", nrow=2, ncol=2, dimnames = list(c('a','b'), c('a','b'))),
	   mxData(covMatrix, 'cov', numObs = 100),
	   mxExpectationRAM("A", "S", "F"),
	   mxFitFunctionML())

model[["A"]]$free[2,1] <- TRUE
model[["A"]]$values[2,1] <- NA   # oops

omxCheckError(mxRun(model, silent=TRUE),
	      "Parameter 'missingtest.A[2,1]' has no starting value")

model$A$free[,] <- FALSE
model$S$free[,] <- FALSE
model <- omxAssignFirstParameters(model)  # should do nothing with no free parameters


test<-matrix(rnorm(100,0,1),ncol=2)
colnames(test)<-c('v1','v2')
testm<-mxModel(
  type='RAM',
  mxData(test,type='raw'),
  mxMatrix(name='A',ncol=2,nrow=2),
  mxMatrix(name='S',ncol=2,nrow=2,labels=c('freematrix1[1,1]',NA,NA,'freematrix2[1,1]')),
  mxMatrix(name='freematrix1',values=3,free=T,nrow=1,ncol=1,labels='freeparam1'),
  mxMatrix(name='freematrix2',values=2,free=T,nrow=1,ncol=1,labels='freeparam1'),
  mxMatrix(name='M',ncol=2,nrow=1),
  mxMatrix(name='F',type='Diag',,values=1,ncol=2,nrow=2,dimnames=list(c('v1','v2'),c('v1','v2'))),
  mxExpectationRAM(M='M',dimnames=c('v1','v2')),
  mxFitFunctionML()
)
omxCheckEquals(length(omxGetParameters(testm)), 1L)

vn <- expect_warning(mxModel("varName", type="RAM",
                              manifestVars=':-<'),
                      "illegal because it contains the characters")

vn <- expect_warning(mxModel("varName", type="RAM",
                             latentVars = ":-)"),
                     "illegal because it contains the characters")