complex exponents for e  Printable Version + HP Forums (https://archived.hpcalc.org/museumforum) + Forum: HP Museum Forums (https://archived.hpcalc.org/museumforum/forum1.html) + Forum: Old HP Forum Archives (https://archived.hpcalc.org/museumforum/forum2.html) + Thread: complex exponents for e (/thread233962.html) 
complex exponents for e  Ed Look  11142012 Neither the 50g nor 49g+ seem to be able to give me EXP(ix). I get some error message that I can't do this in EQW mode.
Is this a bug? (Or is it me??)
Re: complex exponents for e  Luiz C. Vieira (Brazil)  11142012 Hi, Ed; have you checked the syntax OR mode/FLAG set? I am not with an HP49G in hands right now, but it crossed my mind... Success!
Luiz (Brazil)
Re: complex exponents for e  Ed Look  11152012 Luiz, thanks for the ideas! I will look again at my syntax; I know I'm no expert at the equation writer or CAS in the 50g/49g+. To confess, I've really only just started (less than a week ago! And I've been using and programming these calculators for a while now! I've never until now felt the desire to plot anything on them.)
Also, I will explore the flags. It is very possible something isn't set the way I want it to be. Edited: 15 Nov 2012, 12:27 a.m.
Re: complex exponents for e  Luiz C. Vieira (Brazil)  11152012 Hi, Ed. I tried the keyboard [e^{x}] and it worked fine with a complex argument (0,5). My HP50G still has the default settings, IIRC. The 4MByte big, 639page long HP50G AURM has a brief description at page #198 (378). Cheers.
Luiz (Brazil)
Re: complex exponents for e  Ed Look  11162012 Yeah, it should work fine in normal calculations. However, the Equation Writer in the 50g/49g+ does not seem to allow the inclusion of an imaginary exponent when e is the base. I mean, if you type it from the keyboard and then run a calculation it does work. But say, if I want to plot it on graph on the calculator, then I cannot even get past trying to write the expression, as I get an error message saying I can't do that. But the next second, everything looks fine, I finish writing the equation with my complex exponent with the base e...
... and it won't plot.
Re: complex exponents for e  Paul Dale  11162012 Just get a 34S and enjoy effortless complex exponentials.....
Re: complex exponents for e  George Litauszky  11162012 You can plot complex expressions with the Gridmap mode,with Parametric plot, or in Fast3D with ABS(Compl.Expression) format. See this posts. Re: complex exponents for e  Ángel Martin  11162012 ... or the 41Z module for VINTAGE effortless complex exponentials :) just kidding of course but I couldn't resist.
Although on the CL it has a complete new twist, you must see those complex functions returning instantaneous results  definitely the way the 41 was meant to be.
Re: complex exponents for e  Bart (UK)  11162012 Hi Ed,
Edited: 16 Nov 2012, 5:24 a.m.
Re: complex exponents for e  Ed Look  11162012 George, thanks.
First chance I get I'll read them.
Re: complex exponents for e  Ed Look  11162012 Heh heh... Re: complex exponents for e  Ed Look  11162012 Bart, I tried it both ways.
But the error message came up before this step! When I try first to access the CMPLX menu in Equation Writer, the error message pops up.
Re: complex exponents for e  Bart (UK)  11162012 OK, that's wierd. I can use the CMPLX menu in the equation writer and enter e^{i.X} without any problem, even in real mode (flag 103 clear & 128 set, actually mine works with any combination of these 2 flags). Sounds like your calculator has it's nickers in a twist. Have you tried resetting the calculator? (with ONF1F6 !!backup data first!!)
Re: complex exponents for e  Paul Dale  11162012 With the IR diode addition, it can graph to a printer :) It can graph to the unequaled dot matrix portion of its display as well... Porting HP's graphing and plotting code from one of the 41c modules should be straightforward enough. I started but got sidetracked.
Re: complex exponents for e  Ed Look  11182012 Yipes. I hope it doesn't come to that. Backing up a calculator, even one with a USB connection to a PC, is a pain in the neck. I *think* I have my programs backed up on my PC, and hopefully, some SD card somewhere in a drawer.
But, I'll keep at this... and probably continue to bug all of you.
Re: complex exponents for e  Bart (UK)  11192012 You can try a warm reset with ONF3 which should keep memory intact. However, a full reset is a more reliable way to recover a buggy calculator.
Edited: 19 Nov 2012, 5:07 a.m.
Re: complex exponents for e  Ed Look  11192012 I will do that as soon as I can, and thanks! However, last night, on a whim, I tried exactly what I did last time, although, I bore your advice to use the multiplication operator instead of just typing "iX", in mind. I GOT NO ERROR MESSAGE! And it plotted... not the way I expected, but it did plot. I suppose, that is progress of sorts. Now allow me to confess I was trying to plot Y(X)=[(e^iX)(e^iX)]/2i, (i.e., sin(X), if memory serves, though my memory isn't what it was) just to see what would happen. (I just didn't expect error messages to have cropped up.) Perhaps if there was a way to define or declare a complex mode for the axes or space in the plot itself... I am not as versed in the 50g/49g+ environment as I should be.
