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Bill Allombert on Thu, 18 Jan 2024 11:16:30 +0100
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Re: Bizarre semantic of Mat
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- To: pari-dev@pari.math.u-bordeaux.fr
- Subject: Re: Bizarre semantic of Mat
- From: Bill Allombert <Bill.Allombert@math.u-bordeaux.fr>
- Date: Thu, 18 Jan 2024 11:16:03 +0100
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On Wed, Jan 17, 2024 at 11:19:31PM -0800, Ilya Zakharevich wrote:
> On Wed, Jan 17, 2024 at 11:31:39AM +0100, Bill Allombert wrote:
> > > Is there a simple way to convert a vector-column into a 1 column
> > > matrix (without using matrix())? Mat() is almost there — except for
> > > bizarre special-cases — which are impossible to switch off!
> >
> > There is a trick:
> >
> > ? V=[[1]~,[2]~,[3]~]
> > %28 = [[1]~,[2]~,[3]~]
> > ? Mat(V~)~
> > %29 = Mat([[1]~,[2]~,[3]~])
>
> Hmm? It seems that this is “another ‘cute special case’” — which
> requires PRIOR KNOWLEDGE about the nature of elements of the vector.
> Does not it?
This was implemented before matconcat. Nowadays, it might be
clearer to use matconcat.
Cheers,
Bill.