|Re: Complex conjugate function for the 42s?|
Message #2 Posted by Karl Schneider on 26 Oct 2008, 11:13 p.m.,
in response to message #1 by Hal Bitton in Boise
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.
If indeed "conjugate" is excluded from the 42s, any thoughts as to why?
The HP-42S has no menu of intrinsic complex-number functions or direct entry of complex numbers, as the RPL-based models have -- including the HP-28C and HP-28S that debuted earlier. Therefore, the Re(), Im(), and Arg() functions are missing from the HP-42S as well.
Loss of stack t-register for these operations is another good point.
I believe that a complete ('sticky') menu, even at the cost of separating "COMPLEX" into two three-keystroke functions "R->C" and "C->R", would have been a very good idea.
Here's a set of complex-number functions for the HP-15C:
Edited: 26 Oct 2008, 11:13 p.m.