JuliaStats / Distributions.jl / 2899

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matrix-variate uniformity and unit test overhaul (#1095)

* add test utils to src

* fix inverse wishart variance

* fix MatrixFDist random params

* make size(d, i) generic

* shuffle wishart around

* shuffle inversewishart around

* c0 -> logc0

* throw ArgumentErrors in wisharts

* change integrating constant sign

* make _logpdf generic and make logkernel the eval primitive

* wishart params only return actual params

* MatrixBeta and LKJ params also return dims

* use logc0

* use params right

* update docs

* initialize new matrixvariate tests

* rein in random covariance matrices

* archive Stan output

* add _multivariate test util

* use ScalMat is MatrixBeta

* doc update

* better LKJ univariate

* new tests

* delete old tests

* reshape vector that's already converted in json/stan stuff

* try something else to skirt this reshape issue

93 of 93 new or added lines in 8 files covered. (100.0%)

3644 of 4682 relevant lines covered (77.83%)

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