[Gretl-devel] slight qform() generalization

Hi, when I'm feeling really nerdy I try to use qform() instead of directly writing the matrix product Z'Z. But since qform() is of course actually for x*A*x', I have to insert an identity matrix as the second argument, like this: qform(x', I(cols(x))) So two questions: 1) Is it actually really faster to use qform() for this kind of inner product where A is the identity matrix? (I know the speed difference won't be noticeable anyway, but in theory.) 2) If the answer is yes, could qform() be generalized such that the second argument is optional and defaults to a conformable identity matrix? Then we could write qform(x') for x'x. 2b) Actually it now occurs to me: with this mysterious but indoubtedly great new syntax parser that gretl has, could gretl be clever enough to spot occurrences of x'x and internally execute that as qform(x')? (Still provided the answer to 1 is yes.) thanks, sven