[Gretl-devel] Re: qrdecomp with column pivoting?
On Sun, 5 Jun 2022, Riccardo (Jack) Lucchetti wrote:
Very nice counterxample, Sven, kudos for that. Let me think about it.
In fact this bug also affects the dropcoll() built-in function:
<hansl>
nulldata 4
series z = 0
series x = 1 | zeros($nobs - 1,1)
list X = z x
D = dropcoll(X)
list print D
</hansl>
So yeah, we need to give this proper consideration.
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Riccardo (Jack) Lucchetti
Dipartimento di Scienze Economiche e Sociali (DiSES)
Università Politecnica delle Marche
(formerly known as Università di Ancona)
r.lucchetti(a)univpm.it
http://www2.econ.univpm.it/servizi/hpp/lucchetti
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