Re: [Gretl-devel] convolve function into extra?
Am 21.03.2019 um 13:50 schrieb Allin Cottrell:
On Thu, 21 Mar 2019, Sven Schreiber wrote:
> I agree the text is OK (present = git), but just to be clear
while we're
> at it: k-n will be negative for low k, and when for example p_{-1} is
> not defined, it's not always totally obvious that it will also be
> understood as zero [...]
Where does k-n arise? The r_k formula runs the p-index from 0 to k and
the q-index from k to 0, for each k in [0, m+n], so I don't see how
iteration could throw up a negative index.
Yeah, you're right, I don't remember where I saw that. Seems I was lost
in notation...
cheers
sven