Gretl-devel October 2014

gretl-devel@gretlml.univpm.it

10 participants
17 discussions

by Sven Schreiber

Hi, is this non-error-throwing behavior intended?: <hansl> matrix m = {3, 2, 1} matrix m2 = mshape(m, 0.3, 2) # fractional row number print m2 # no effect m2 # "is NULL" </hansl> This is not with the latest version (instead cvs snapshot from Aug 19), but I guess this hasn't changed recently. thanks, sven

11 years, 1 month

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GUI problem: Option to save modification in script tabs

by henrique.andrade＠bb.com.br

11 years, 1 month

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Re: [Gretl-devel] Strings not marked for translation

by henrique.andrade＠bb.com.br

11 years, 1 month

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Strings not marked for translation

by henrique.andrade＠bb.com.br

11 years, 1 month

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Small GUI related problems

by henrique.andrade＠bb.com.br

11 years, 1 month

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Re: [Gretl-devel] Request for Comments: gnuplot and foreign

by henrique.andrade＠bb.com.br

11 years, 1 month

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slight qform() generalization

by Sven Schreiber

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

11 years, 1 month

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Gretl-devel October 2014