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= Software produced by the SLRA project
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== [software-slra.html SLRA: Software for weighted structured low-rank approximation]
The SLRA package computes locally optimal solutions to low-rank approximation problems with the following features:
- constraint on the approximating matrix,
- /weighted 2-norm/ approximation criterion,
- /fixed elements/ in the approximating matrix,
- /missing elements/ in the data matrix, and
- /linear constraints/ on an approximating matrix's left kernel basis.
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== [software-ident.html IDENT: Package for identification in behavioural setting]
The IDENT package solves identification problems with no a priori separation of the variables into inputs and outputs and representation invariant approximation criterion. The model class consists of linear time-invariant systems of bounded complexity and the approximation criterion is the minimum of a weighted 2-norm distance between the given time series and a time series that is consistent with the model. The problem is equivalent to and is solved as a mosaic-Hankel structured low-rank approximation problem.Additional nonstandard features of the software are specification of exact and missing variables and identification from multiple experiments.
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