omxGetRAMDepth: omxGetRAMDepth
In OpenMx: Extended Structural Equation Modelling
View source: R/MxExpectationRAM.R
omxGetRAMDepth R Documentation
omxGetRAMDepth
Description
Get the potency of a matrix for inversion speed-up
Usage
omxGetRAMDepth(A, maxdepth = nrow(A) - 1)
Arguments
A
MxMatrix object
maxdepth
Numeric. maximum depth to check
Details
This function is used internally by the mxExpectationRAM function
to determine how far to expand (I-A)^{-1} = I + A + A^2 + A^3 + .... It is
similarly used by mxExpectationLISREL in expanding (I-B)^{-1} = I + B + B^2 + B^3 + ....
In many situations A^2 is a zero matrix (nilpotent of order 2). So when A has large
dimension it is much faster to compute I+A than (I-A)^{-1}.
OpenMx documentation built on Aug. 21, 2025, 5:48 p.m.
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View source: R/MxExpectationRAM.R
| omxGetRAMDepth | R Documentation |
omxGetRAMDepth
Description
Get the potency of a matrix for inversion speed-up
Usage
omxGetRAMDepth(A, maxdepth = nrow(A) - 1)
Arguments
A |
MxMatrix object |
maxdepth |
Numeric. maximum depth to check |
Details
This function is used internally by the mxExpectationRAM function
to determine how far to expand (I-A)^{-1} = I + A + A^2 + A^3 + .... It is
similarly used by mxExpectationLISREL in expanding (I-B)^{-1} = I + B + B^2 + B^3 + ....
In many situations A^2 is a zero matrix (nilpotent of order 2). So when A has large
dimension it is much faster to compute I+A than (I-A)^{-1}.
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
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