Hi all.
Just realized that my 42s doesn't seem to have a conjugate function.
There seems to be no mention of it the users guide either. Granted, it's easy enough to decompose the complex number, CHS, and recompose, but in so doing the contents of the T register is lost.
Also granted, a simple subroutine would resolve this issue.
If indeed "conjugate" is excluded from the 42s, any thoughts as to why?
Best regards, Hal
Complex conjugate function for the 42s?


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10262008, 09:22 PM
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10262008, 11:13 PM
Quote: Just now? ;)
Quote: The HP42S has no menu of intrinsic complexnumber functions or direct entry of complex numbers, as the RPLbased models have  including the HP28C and HP28S that debuted earlier. Therefore, the Re(), Im(), and Arg() functions are missing from the HP42S as well. Loss of stack tregister for these operations is another good point. I believe that a complete ('sticky') menu, even at the cost of separating "COMPLEX" into two threekeystroke functions "R>C" and "C>R", would have been a very good idea. Here's a set of complexnumber functions for the HP15C: http://www.hpmuseum.org/cgisys/cgiwrap/hpmuseum/archv018.cgi?read=137175#137175
 KS Edited: 26 Oct 2008, 11:13 p.m. ▼
10272008, 12:11 AM
Quote:Well, I've only had my 42S for a few months, and have not run a lot of complex numbers through it. 8^\
I would say that the rational behind the omition of these functions on the 42s (Re, Im, Arg, Conj) is the ease of complex number decomposition (and recomposition). There still is of course the T reg issue, but just entering complex numbers obliterates the T register anyway, so there you go...3 (complex) registers are enough I suppose.
