Re: Database madness
Gunter K�nigsmann via Maxima-discuss <[email protected]> Mon, 27 Jul 2026 08:49:55 +0200
| Newsgroups | gmane.comp.mathematics.maxima.general |
|---|---|
| Message-ID | <[email protected]> |
--===============3578318977073247469== Content-Type: multipart/alternative; boundary=----WAUN4DI9JI8EYM2O9NSW84BZIM8WRI Content-Transfer-Encoding: 7bit ------WAUN4DI9JI8EYM2O9NSW84BZIM8WRI Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Actually I encounter that slowness frequently when trying to make Maxima de= al with real-life oscillograms=2E Kind regards,=20 Gunter=2E=20 On 27 July 2026 06:45:09 CEST, Robert Dodier <robert=2Edodier@gmail=2Ecom>= wrote: >On Sun, Jul 26, 2026 at 3:36=E2=80=AFPM David Scherfgen via Maxima-discus= s ><maxima-discuss@lists=2Esourceforge=2Enet> wrote: >> >> In this extreme case, maybe it's pathological=2E But comparisons happen= all the time in the general simplifier, via sign, csign, mgrp, etc=2E, and= in integration, limits, equation solving, =2E=2E=2E > >Right, it is not pathological, it is not hard to encounter it=2E I have >bumped into it via an implementation of a piecewise interpolating >function which produces functions which look like > > if x < 0=2E5 then =2E=2E=2E elseif x < 1=2E2 then =2E=2E=2E elseif x < = 5=2E3 then =2E=2E=2E > >which ends up creating database items for 0=2E5, 1=2E2, 5=2E3, etc=2E >Obviously this becomes a problem if the number of pieces in the >piecewise function is large=2E > >FWIW > >Robert > > >_______________________________________________ >Maxima-discuss mailing list >Maxima-discuss@lists=2Esourceforge=2Enet >https://lists=2Esourceforge=2Enet/lists/listinfo/maxima-discuss ------WAUN4DI9JI8EYM2O9NSW84BZIM8WRI Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable <html><head></head><body><div dir=3D"auto">Actually I encounter that slowne= ss frequently when trying to make Maxima deal with real-life oscillograms= =2E<br><br>Kind regards, <br><br>=C2=A0 Gunter=2E </div><br><br><div class= =3D"gmail_quote"><div dir=3D"auto">On 27 July 2026 06:45:09 CEST, Robert Do= dier <robert=2Edodier@gmail=2Ecom> wrote:</div><blockquote class=3D"g= mail_quote" style=3D"margin: 0pt 0pt 0pt 0=2E8ex; border-left: 1px solid rg= b(204, 204, 204); padding-left: 1ex;"> <pre class=3D"net-thunderbird-android__plain-text-message-pre"><div dir=3D= "auto">On Sun, Jul 26, 2026 at 3:36=E2=80=AFPM David Scherfgen via Maxima-d= iscuss<br><maxima-discuss@lists=2Esourceforge=2Enet> wrote:<br></div>= <blockquote class=3D"gmail_quote" style=3D"margin-bottom: 1ex; --net-thunde= rbird-android__blockquote-default-border-color: #729fcf;"><div dir=3D"auto"= ><br>In this extreme case, maybe it's pathological=2E But comparisons happe= n all the time in the general simplifier, via sign, csign, mgrp, etc=2E, an= d in integration, limits, equation solving, =2E=2E=2E<br></div></blockquote= ><div dir=3D"auto"><br>Right, it is not pathological, it is not hard to enc= ounter it=2E I have<br>bumped into it via an implementation of a piecewise = interpolating<br>function which produces functions which look like<br><br> = if x < 0=2E5 then =2E=2E=2E elseif x < 1=2E2 then =2E=2E=2E elseif x= < 5=2E3 then =2E=2E=2E<br><br>which ends up creating database items for= 0=2E5, 1=2E2, 5=2E3, etc=2E<br>Obviously this becomes a problem if the num= ber of pieces in the<br>piecewise function is large=2E<br><br>FWIW<br><br>R= obert<hr>Maxima-discuss mailing list<br>Maxima-discuss@lists=2Esourceforge= =2Enet<br><a href=3D"https://lists=2Esourceforge=2Enet/lists/listinfo/maxim= a-discuss">https://lists=2Esourceforge=2Enet/lists/listinfo/maxima-discuss<= /a><br></div></pre></blockquote></div></body></html> ------WAUN4DI9JI8EYM2O9NSW84BZIM8WRI-- --===============3578318977073247469== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline --===============3578318977073247469== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ Maxima-discuss mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/maxima-discuss --===============3578318977073247469==--