[galaxyLogic]

Interesting idea. I wonder would it be possible to create a spreadsheet-app where every "sheet" was a matrix and then you would apply linear algebra operations between the sheets to produce output-sheets. Would that be all a spreadsheet-app needs? It might be a simpler unifying design for spreadsheet programming.

The problem I've had with Excel etc. is that every cell can hide an operation and some do and some don't and it becomes difficult to understand what the totality of calculation is. Whereas if it could be expressed as operations between matrices the whole calculation could be expressed as a single formula, perhaps. (?)