[Gretl-devel] matrix gui

[Allin Cottrell]

It turns out the (relatively) hard work was just adapting the data 
editor spreadsheet for matrix use (still not as good as it could 
be, but workable) and hooking up a matrix back-end.  That done, a 
lot of other things come more or less for free.  So here's what we 
have now:

* A "properties" window for matrices.  Not very interesting for 
non-square matrices at this point, but for square ones you get a 
reading on symmetry, positive definiteness, determinant, 
eigenvalues and so on.

* The gui matrix editor now has a menu of transformations such as 
X'X, transpose, Cholesky decomposition and such.  Also a "save as" 
button to let you save a transformation under another name.

Might be of some use for pedagogical purposes.

Allin.