MSE.Grids: A function to compute MSE of the GFA given robust components...
In kforthman/optmThrGFA: Optimize Thresholds for GFA.

A function to compute MSE b/w observed and reconstructed data matrices for each replicate for each pair of (corThr, matchThr).

1	MSE.Grids(Ymtx, comps, match.res, corGrids, matchGrids)

`Ymtx`	The set of observed data as an NxD matrix.
`comps`	A list of GFA replicates with posterior medians.
`match.res`	No description.
`corGrids`	is a vector of cor thresholds to be tested. Cor threshold defines how close two components are required to be, in terms of correlation, in order to match them.
`matchGrids`	is a vector of match thresholds to be tested. Match threshold describes the proportion of sampling chains that need to contain a component in order to include it in the robust components.