On Thu, 9 May 2019, Riccardo (Jack) Lucchetti wrote:
On Thu, 9 May 2019, Sven Schreiber wrote:
> Am 09.05.2019 um 20:57 schrieb Allin Cottrell:
>
>> I agree with Sven that some clean-up and enhancement is needed, but I
>> suggest we propose that till after the 2019b release. I think what
>> might be best, when we get to it, is
>>
>> * Revert the "vif" command to just producing the VIFs (which are not
>> very sophisticated but are easy to interpret). And support a larger
>> set of estimators to the extent possible (but this would not include
>> nls, mle or gmm). The VIF vector to be available as $result.
>>
>> * Add a built-in bkw function which uses what's now in the C code to
>> replace Lee's package. Any covariance matrix accepted, so nls, mle and
>> gmm should be fine.
>>
>> * Rejig the GUI "Collinearity" menu item so that it produces
what's
>> appropriate for the model in the window -- possibly with a choice of
>> VIFs, BKW or both, if applicable.
>>
>> * I think the doc should have something substantive (besides the
>> reference to Lee's paper, which is fine in itself) by way of
>> explanation of the BKW matrix, which is IMO by no means transparent.
>
> Sounds good to me! (Also the postponement.)
I like this too.
Great, seems like we're on the same page. Adding a built-in bkw
function should be quick work, the other points may take a little
longer.
Allin