[comp.sys.handhelds] Numerical integration on the hp48SX

berg@marvin.e17.physik.tu-muenchen.de (Stephen R. van den Berg) (02/12/91)

I was wondering, in some sales magazine from HP it said that the HP48SX
is not capable of numerical intergration (contrary to the HP28S).

I thought the HP48SX was a complete superset of the HP28S, and should
support numerical intergration as well.  Could somebody shed some
light onto this matter?
--
Sincerely,                 berg@marvin.e17.physik.tu-muenchen.de
           Stephen R. van den Berg.
"I code it in 5 min, optimize it in 90 min, because it's so well optimized:
it runs in only 5 min.  Actually, most of the time I optimize programs."

austern@csa2.lbl.gov (Matt Austern) (02/13/91)

In article <3949@rwthinf.UUCP>, berg@marvin.e17.physik.tu-muenchen.de (Stephen R. van den Berg) writes...
>I was wondering, in some sales magazine from HP it said that the HP48SX
>is not capable of numerical intergration (contrary to the HP28S).
> 

As many people have probably said in email, the hp48 does have numerical
integration.  (A very useful feature!)  

Here's my question: does anyone know what algorithm it uses?  I'm guessing
something like Romberg integration, with control over accuracy but with
uniformly sized intervals.

billw@hpcvra.cv.hp.com. (William C Wickes) (02/13/91)

The HP 48SX has the same numerical integrator as the HP 28S.

Bill Wickes
HP Corvallis

bob@dolores.Stanford.EDU (Bob Lodenkamper) (02/13/91)

The question was what algorithm the 48SX uses for integration.  I'm
guessing that it's basically the same one HP used in the 15C - Romberg
with a nonuniform mesh.

- Bob