Hello,
I am having trouble solving simultaneous equations, 2X2 or 3X3 when complex numbers are used. Despite the approach I take, a syntax error always develops when I enter the constants. Please help!! Thank you.
Tom
HP48 Complex Matrices or Simultaneous Equations
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04-01-2006, 10:12 PM
Hello, I am having trouble solving simultaneous equations, 2X2 or 3X3 when complex numbers are used. Despite the approach I take, a syntax error always develops when I enter the constants. Please help!! Thank you. Tom
04-01-2006, 10:18 PM
Hello Tom, I hope the following may help: http://www.hpmuseum.org/cgi-sys/cgiwrap/hpmuseum/archv015.cgi?read=82010 Gerson.
04-01-2006, 11:58 PM
Tom -- In addition to Gerson's link, the following threads from Archive #15 should also be helpful to you: HP-49G Vector-Matrix Multiplication -- KS
04-02-2006, 02:44 PM
Hello Karl, I never used the "Solve lin sys..." in the 48 because my colleague's program was easier to use (I'd just enter the circuit equations and the list of unknows). Too bad the program does not work in the 49G. I tried different flags settings but to no avail. Do you, or someone else, know how flags should be set so that the 49G/G+ becomes as most compatible as possible with the 48? Thanks. Gerson.
04-02-2006, 04:57 PM
Hello, Gerson -- Sorry, although I have one example of each RPL-based HP calculator (28C/48G/49G) with manuals, I'm not very proficient at any of them, and don't really want to make the effort to do so. I can't even find some of the menu-driven functionality of the HP-48G (such as numerical integration) on the HP-49G. Maybe James Prange would know best how to emulate a 48G on a 49G... -- KS
04-02-2006, 05:43 PM
Hello Karl,
Quote: I cannot find that either. On the 49G, I prefer flag -117 set (soft menus instead of choose boxes) and, needless to say, RPN. I spent so many years before graduating, working during the day and rushing to college after hours, that various generations of HP calculators passed me by (15C, 28S, 48 :-) Thanks just the same, Gerson.
04-05-2006, 07:41 PM
Quote:Write your own ROM (actually flash) code? Maybe a huge library?
Although the 49 series has some improvements and is more fun to
Sometimes the CAS does things that I don't want, and I don't know
Quote:
Maybe you mean the input form that you get on the 48GX by pressing
Note that on an RPL level, there are few (if any) differences
The Advanced User's Manual for the 49g+ / 48gII is a lot more
Federico's documents on the flags and reserved names may also be
As Gerson noted, obviously we want RPN mode. After a memory clear
You can use the SF and CF commands, but MODE gives you an input
You may, depending on what you're doing, prefer approximate mode
The HEADER\-> command returns the header size, and the \->HEADER
A "textbook" stack display is available, but I generally prefer to
There are various other system flags for the stack display; should
Different font sizes are available; how good are your eyes?
You can also make your own custom fonts; do you want little bars
The "menu-map" seems to leave a lot to be desired. Sometimes there
But some of the good old menus are available through shift-hold
The keycodes have more "planes" (11 of them) available; you can
Wolfgang's Keyman library allows even more user key assignments,
The 49g+ AUR's appendix H lists the menu numbers, including the
Once you're at a menu, you can use the RCLMENU command to get the
You could write a program like \<< 75. MENU \>>to go directly to the numeric root solver. Or you could make a program like \<<to give you a menu for getting to various useful built-in menus. Or if you change the TMENU to MENU, the program will make your CUSTOM menu.
The CAT operation lets you browse all of the commands. Some
The KEYEVAL command lets you "press a key", allowing you to
Generally, if a command is available for what you want, that's
You can, for example, execute the CAT operation on the 49G by #2EF67h SYSEVALon the 49 series, is a work-around.
I just discovered that disabling last stack saves also trashes any
It seems to me that KEYEVAL might best be considered a "hacker's
But KEYEVAL can be useful. Don't like the keyboard layout? An { \<< -22.2 KEYEVAL \>> 22.1 \<< -22.1 KEYEVAL \>> 22.2 } STOKEYSAssigning those simple programs to user keys seems pretty safe.
The 49 series includes MASD for programming in SysRPL and assembly
The SYSEVAL, LIBEVAL, and FLASHEVAL commands allow you to invoke
Also see (and search) the
Like the 48 series, the 49 series is highly customizable, but even
I have my doubts that you can make the 49 series behave just like
Regards,
04-05-2006, 10:44 PM
James -- Thank you for the extraordinary effort in your response -- it was "above and beyond the call of duty", to use a military expression. The original question in the thread was from Gerson:
Quote: And yes, I was indeed referring to the menu-assisted input form for symbolic and numeric integration on the HP-48G series. -- KS
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