...On Sat, Jan 14, 2023 at 12:48 PM Sven Schreiber <sven.schreiber@fu-berlin.de> wrote:
OK, I explicitly uninstalled gretl and re-installed the same snapshot, and indeed the error is gone. Perhaps there was some confusion across the scripts and the console. One less thing to worry about!I just tried the Jan 1 and Jan 10 Windows snapshots, in both English and German, and saw no such error. I can't really believe in this error without seeing a screenshot where the relevant commands are prefaced by "clear".
I meant if some speed difference is to be expected, or if it's calling into the same underlying BLAS routines anyway.Right, OK. So what's actually recommended in those and similar cases, using the mols() function or the "/" or "\" operators? (Provided the residuals aren't wanted afterwards, which are only provided by mols.)Is a recommendation really called for here? I mean, do as you please: the results will be the same to machine precision.
I absolutely agree.One might say that enabling the least-squares solution via "/" is redundant given the existence of mols(), but if it were not enabled our right-division wouldn't work like other software such as Matlab, and cross-compatibility is nice to have if it's not too hard to arrange.
BTW the matrix chapter of the Guide (in git) now gives a fuller account of right-division.
Much appreciated!
thanks
sven