Matrix name matname is the name of a positive-definite Stata matrix with the default of ( ), the identity matrix of dimension . If relevel(levelvar) is omitted, the specified parameters are used for inverse-Wishart priors for all levels with unstructured random-effects covariances. Otherwise, ...
We start with the matrix AA: A=[132433]A=[123343] AA has linearly independent columns, and so to calculate A+A+, we can use our first shortcut A+=(AT⋅A)−1⋅ATA+=(AT⋅A)−1⋅AT. Let's start by calculating the transpose of AA, denoted as ATAT. AT=[123343]AT=[132...