OpenMx 0.4.1
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This time was have a twofer for you. We were getting prepared to release version 0.4.0, and we detected a few bugs before the release of 0.4.0. So below is the change log for OpenMx 0.4.0 and 0.4.1. This is mostly a bug fixing release. So we recommend upgrading to this version. There are a few performance improvements. Most notably there should be an improvement to our users running FIML models with ordinal data. Expect to see more performance improvements as we get closer to the 1.0 release.
mxCompare(oneModelOnly)
the old gen_epi helper tableFitStatistics(fit) would accept just one parameter, and describe that model's fit:
> tableFitStatistics(fit)
Name ep -2LL df AIC
Model 1 : top 7 2964.37 468 2028.37
> tableFitStatistics(fit)
Name ep -2LL df AIC
Model 1 : top 7 2964.37 468 2028.37
The built-in replacement throws an error when the comparison list is omitted:
> mxCompare(fit)
Error in mxCompare(fit) :
'comparison' argument be a MxModel object or list of MxModel objects
It would be nice if it defaulted to simply give the base model data when no comparison models are provided...
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OpenMx and classic Mx do not agree
Quote:
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qr() equivalent in an nxAlgebra
In order to implement alternative FIML objective functions, it would be nice to have an equivalent to R's QR decomposition.
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summary() error for mxRowObjective
summary() called on a model with an mxRowObjective dies with the message:
> summary(rmodRun)
Error in inherits(x, "factor") :
no slot of name "dims" for this object of class "MxRowObjective"
This is not a 1.0 priority, but is likely an easy fix if someone is looking at summary() anyway.
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crossprod(x) <- t(x) %*% y
The following algebras would be nice to have. They are currently scheduled for completion after the 1.0 release:
ceiling, floor, trunk, round
dim
rowMeans, colMeans
cov2cor
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Update wiki matrix operators & functions
The wiki page is out of date. I'll update it when I have a better interface than the iPhone. See data/omxSymbolTable.tab
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Matrix indexing using mxAlgebra and definition variables
The sorting of raw data is causing a bug when attempting to index using definition variables. Steve's script will move from my inbox to this bug report when I get back to civilization.
Invoke as.numeric on field of MxData object
Steve has a test case where an integer type value causes the backend to barf. Calling as.numeric on the field should fix this problem. Writing this down so I don't forget.
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Fix summary error that I created
Find the bug in models failing simplealgebraci.r and correct the bug I introduced. Writing this down so I don't forget.
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