New subject: [Gretl-users] vertical matrix concatenation (was matrix declaration error)

Tuesday, 30 January 2007

On Tue, 30 Jan 2007, Riccardo (Jack) Lucchetti wrote:

...
 X = (a ~ b') ~' ( c ~' d)

 and

 X = (a ~' b') ~' ( c' ~ d)

 are not immediate to tell apart. 
Yikes, no, I don't like that.

...
 Hence, my counter-proposal (which, I admit, does have drawbacks, 
 but is still preferable IMHO): use "|" for vertical 
 concatenation and switch to "&&" and "||" for logical
operators. 
 It will break existing syntax, but it'd be better in the long 
 run. 
That does make sense, but I'm a bit reluctant to change the 
meaning of logical "&" and "|" right now -- though we could do 
that later with fair warning.

How about '#' for now?  It's not pretty (or standard), but it 
shouldn't collide with anything and is visually distinctive.

Allin

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Re: [Gretl-users] vertical matrix concatenation (was matrix declaration error)