Get the potency of a matrix for inversion speed-up
omxGetRAMDepth(A, maxdepth = nrow(A) - 1)MxMatrix object
Numeric. maximum depth to check
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 \((I-A)^{-1}\).