[Gretl-devel] Re: Default col argument for matrix creation functions
Am 07.07.2019 um 20:41 schrieb Riccardo (Jack) Lucchetti:
On Sun, 7 Jul 2019, Sven Schreiber wrote:
Actually, you got me thinking about the possibility of having a
second
argiment to I() (aka F_IMAT); in many cases, you want to construct a
matrix that is an identity matrix "plus some zeros"; without loss of
backward compatibility, we may introduce an optional 2nd argument to I()
such that I(r,c) returns
* I(r) ~ zeros(r, c-r) if c > r,
* I(c) | zeros(r-c, c) if r < c
You mean r > c, but apart from that, why not.
Besides, I believe this is what Matlab does, so this would also be
nice
to have when porting scripts from the Octave/Matlab galaxy.
Yes it seems they do that. Of course, if you want to appeal to those
people, you could also make "eye" an alias for "I", but perhaps that
would rather be something for Peter's matlab_utilities package.
cheers
sven