Late to the power party!
This is one way to automate the OEIS look-up - I'm not an expert on
parsing the result, but hunting for 'A', a single digit seems
a good starter:
OEIS =: 'http://oeis.org/search?q=' NB. fails with https://... !
getoeisseries =:{{ {{(-.{.) ' ',,/ y&{{~.x{~(i.7)
I don't yet see how to separate the series itself/themselves from
cross-refs!
M
On 06/03/2022 12:18, 'Michael Day' via Programming wrote:
Late to the power party!
This is one way to automate the OEIS look-up - I'm not an expert on
parsing the result, but hunting for 'A', a single digit seems
Here's a version of getoeisseries which only returns direct hits and
not cross references:
NB. install 'web/gethttp'
require'regex web/gethttp'
OEIS =: 'http://oeis.org/search?q=' NB. fails with https://... !
getoeisseries=: {{
a0=. I.''E.RAW
A=. ,{."1'href="/A\d{6}"'rxmatches RAW
a=. RAW
OK - Ian wondered about automating a search in OEIS.
With a little inspection of the "page source" I've come up with this
script; it seems to work!
Although lots of OEIS lists are potentially mentioned if a series is
matched, many are cross-references
rather than the lower number of series
I forgot about regular expressions in J, but not familiar with them anyway!
Used to know them in unix, once upon a time.
Yr commas much better, too.
M
On 06/03/2022 17:02, Raul Miller wrote:
Here's a version of getoeisseries which only returns direct hits and
not cross references:
NB. install
Oops - please use this line in goeis, just below,
echo ' results found',~ ": +/ok
in place of
echo '3 results found'
Mike
On 06/03/2022 17:05, 'Michael Day' via Programming wrote:
OK - Ian wondered about automating a search in OEIS.
With a little inspection of the "page source" I've come
I frequently rely on two documentation mechanisms when I want to use
regular expressions in J:
(*) open 'regex' -- this lets me read the comments while looking at
the definitions. The exported names begin with rx, and rxmatches is
one of the mechanisms I reach for most often. J's open verb might
