#
#   Copyright 2007-2018 by the individuals mentioned in the source code history
#
#   Licensed under the Apache License, Version 2.0 (the "License");
#   you may not use this file except in compliance with the License.
#   You may obtain a copy of the License at
# 
#        http://www.apache.org/licenses/LICENSE-2.0
# 
#   Unless required by applicable law or agreed to in writing, software
#   distributed under the License is distributed on an "AS IS" BASIS,
#   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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#   limitations under the License.


require(OpenMx)
myDataCov<-matrix(
	c(0.672, 0.315, 0.097, -0.037, 0.046,
	  0.315, 1.300, 0.428,  0.227, 0.146,
	  0.097, 0.428, 1.177,  0.568, 0.429,
	 -0.037, 0.227, 0.568,  1.069, 0.468,
	  0.046, 0.146, 0.429,  0.468, 1.031),
	nrow=5,
	dimnames=list(
	c("x1","x2","x3","x4","x5"),
	c("x1","x2","x3","x4","x5"))
	)
	
myDataMeans <- c(3.054, 1.385, 0.680, 0.254, -0.027)
names(myDataMeans) <- c("x1","x2","x3","x4","x5")

model<-mxModel("Autoregressive Model, Matrix Specification, Covariance Data",
      mxData(myDataCov,type="cov", means=myDataMeans, numObs=100),
      mxMatrix("Full", nrow=5, ncol=5,
            values=c(0,0,0,0,0,
                     1,0,0,0,0,
                     0,1,0,0,0,
                     0,0,1,0,0,
                     0,0,0,1,0),
            free=c(F, F, F, F, F,
                   T, F, F, F, F,
                   F, T, F, F, F,
                   F, F, T, F, F,
                   F, F, F, T, F),
            labels=c(NA,     NA,     NA,     NA,     NA,
                     "beta", NA,     NA,     NA,     NA,
                     NA,     "beta", NA,     NA,     NA,
                     NA,     NA,     "beta", NA,     NA,
                     NA,     NA,     NA,     "beta", NA),
            byrow=TRUE,
            name="A"),
      mxMatrix("Symm", nrow=5, ncol=5, 
            values=c(1, 0, 0, 0, 0,
                     0, 1, 0, 0, 0,
                     0, 0, 1, 0, 0,
                     0, 0, 0, 1, 0,
                     0, 0, 0, 0, 1),
            free=c(T, F, F, F, F,
                   F, T, F, F, F,
                   F, F, T, F, F,
                   F, F, F, T, F,
                   F, F, F, F, T),
            labels=c("varx", NA,  NA,  NA,  NA,
                     NA,     "e2", NA,  NA,  NA,
                     NA,      NA, "e3", NA,  NA,
                     NA,      NA,  NA, "e4", NA,
                     NA,      NA,  NA,  NA, "e5"),
            byrow=TRUE,
            name="S"),
      mxMatrix("Iden",  nrow=5, ncol=5,
      		dimnames=list(
				c("x1","x2","x3","x4","x5"), c("x1","x2","x3","x4","x5")),
            name="F"),
      mxMatrix("Full", nrow=1, ncol=5,
            values=c(1,1,1,1,1),
            free=c(T, T, T, T, T),
            labels=c("mean1","int2","int3","int4","int5"),
            dimnames=list(
				NULL, c("x1","x2","x3","x4","x5")),
            name="M"),
      mxFitFunctionML(),mxExpectationRAM("A","S","F","M")
      )
      
autoregressiveMatrixCov<-mxRun(model)

autoregressiveMatrixCov$output

chisq = autoregressiveMatrixCov$output$Minus2LogLikelihood - autoregressiveMatrixCov$output$SaturatedLikelihood

# Slightly disagrees with old Mx Output, but matches Mplus exactly
omxCheckCloseEnough(autoregressiveMatrixCov$output$estimate[["beta"]], 0.4268, 0.001)
omxCheckCloseEnough(autoregressiveMatrixCov$output$estimate[["varx"]], 0.6652, 0.001)
omxCheckCloseEnough(autoregressiveMatrixCov$output$estimate[["e2"]], 1.1419, 0.001)
omxCheckCloseEnough(autoregressiveMatrixCov$output$estimate[["e3"]], 1.0379, 0.001)
omxCheckCloseEnough(autoregressiveMatrixCov$output$estimate[["e4"]], 0.7905, 0.001)
omxCheckCloseEnough(autoregressiveMatrixCov$output$estimate[["e5"]], 0.8179, 0.001)
omxCheckCloseEnough(autoregressiveMatrixCov$output$estimate[["mean1"]], 3.054, 0.001)
omxCheckCloseEnough(autoregressiveMatrixCov$output$estimate[["int2"]], 0.0816, 0.001)
omxCheckCloseEnough(autoregressiveMatrixCov$output$estimate[["int3"]], 0.0889, 0.001)
omxCheckCloseEnough(autoregressiveMatrixCov$output$estimate[["int4"]], -0.036, 0.001)
omxCheckCloseEnough(autoregressiveMatrixCov$output$estimate[["int5"]], -0.135, 0.001)
omxCheckCloseEnough(chisq, 8.4949, 0.001)
