Re: [Gretl-users] matrix declaration error

On Tue, 30 Jan 2007, Riccardo (Jack) Lucchetti wrote: > On Tue, January 30, 2007 12:56, Sven Schreiber wrote: > >> (btw, a vertical concatenation operator wouldn't hurt ;-) > > I was thinking the same thing a few weeks ago. The one thing that > stopped me from implementing this is that the "|" character, almost > unversally used to indicate vertical concatenation in matrix > languages, is already taken by the "or" operation. > > It it feasible, in principle, to distinguish between the two uses: > theoretically, given the expression "a | b" we first check that a and > b are matrices with the same number of columns; if not, "|" should be > interpreted as "or". I fear this could end up being a bit confusing, > though. Confusing for the parser to have symbols that map to different operators, with different levels of precedence, depending on context. I've added vertical concatenation in CVS, for the moment using '`' (backtick) as the operator symbol. If anyone has a better idea, I'll be happy to listen. Backslash or '#' would be other possibilities.