Re: [Gretl-users] pre-multiplication by transpose

Point taken. But your example holds true whether or not we write x'y or x'*y, doesn't it? Said another way, it seems to me that your example illustrates the need for careful scripting rather than the "right" treatment of x'y vs x'*y. For example, suppose that I have a script that is designed to compute (1x2)*(2x2)*(2x2), but that an earlier step produces a 2x1 matrix for the second term. Then as I've written it (A*B*C) I'd get a possibly misleading result, whereas A*(B*C) would give an error and cause me to revise my code. Granted, in this example I'd rather have the error. Going back to Allin's original question (whether gretl's treatment of m1'm2 or m1'*m2 is "right"), your example illustrates a potential problem when m1 is 'unintentionally' a 1x1 matrix. Are you suggesting that both treatments should give an error? I'm willing to be persuaded, but that is inconsistent with other languages. -----Original Message----- From: gretl-users-bounces(a)lists.wfu.edu [mailto:gretl-users-bounces@lists.wfu.edu] On Behalf Of Alan G Isaac Sent: Friday, December 07, 2012 1:05 PM To: Gretl list Subject: Re: [Gretl-users] pre-multiplication by transpose On 12/7/2012 12:58 PM, Summers, Peter wrote: Indeed. That is the point of the example. _______________________________________________ Gretl-users mailing list Gretl-users(a)lists.wfu.edu http://lists.wfu.edu/mailman/listinfo/gretl-users