HP's Handling of Complex Numbers



#4

After a well thought out treatment of complex numbers on the 15C and the 42S for example, what went wrong with the convoluted management of them on the 32Sii and 33S?

tm


#5

Quote:
After a well thought out treatment of complex numbers on the 15C and the 42S for example, what went wrong with the convoluted management of them on the 32Sii and 33S?

I agree completely with your sentiments, but what had already happened was the HP-32S (the forerunner of the 32SII and 33S), and the HP-41 Math Pac.

Apparently, it was decided not to provide good complex-number handling on the HP-32S, but rather to implement in microcode what had been developed as RPN programs for the HP-41 Math Pac (and later copied to the Advantage Pac). How many readers have noticed how similar those complex-number function sets are?

I'm glad that the functions were included on the HP-32S/32SII/33S, because they are very useful for programmed applications, albeit cumbersome for interactive use.

The HP-32S didn't have the flexibility of the HP-42S display, but the HP-15C's implementation of complex numbers might have been a bit awkward on the menu-driven HP-32S. For example, the indirect register "I" was denoted "i" on the HP-32S because there already was a regular storage register I. Functions for Re<->Im, Re->Cpx ("f I"), SHOW Im ("f (i)"), Cpx mode ("SF 8"), Re mode ("CF 8") would have been needed under a menu (or two).

Here's a post you might find interesting:

http://www.hpmuseum.org/cgi-sys/cgiwrap/hpmuseum/archv014.cgi?read=63415#63415

-- KS


Edited: 31 July 2006, 11:25 p.m.


#6

Thank you for the info.

tm


Possibly Related Threads…
Thread Author Replies Views Last Post
  HP Prime: complex numbers in CAS. Alberto Candel 1 1,876 12-06-2013, 02:36 PM
Last Post: parisse
  [HP Prime] Plots containing complex numbers bug? Chris Pem10 7 3,587 12-05-2013, 07:40 AM
Last Post: cyrille de Brébisson
  Complex Number Entry on Prime Jeff O. 19 5,050 11-16-2013, 12:34 PM
Last Post: Jeff O.
  Trig vs hyperbolic handling differences in Prime CAS Michael de Estrada 3 1,542 11-08-2013, 06:26 PM
Last Post: Mark Hardman
  comparing numbers on the WP 34S Kiyoshi Akima 7 2,459 10-19-2013, 09:28 AM
Last Post: walter b
  HP Prime: Operations with Large Numbers Eddie W. Shore 0 947 10-19-2013, 12:24 AM
Last Post: Eddie W. Shore
  HP Prime complex results Javier Goizueta 0 964 10-06-2013, 12:59 PM
Last Post: Javier Goizueta
  HP Prime Solving Nonlinear System of Equations for Complex Results Helge Gabert 11 4,145 09-30-2013, 03:44 AM
Last Post: From Hong Kong
  HHC 2013 room numbers David Hayden 2 1,285 09-20-2013, 05:34 PM
Last Post: sjthomas
  [HP-Prime xcas] operations with complex numbers + BUGs + Request CompSystems 9 3,392 09-08-2013, 10:40 PM
Last Post: CompSystems

Forum Jump: