HP50g ABS value Graph

08122021, 04:09 AM
Post: #1




HP50g ABS value Graph
I’m surely doing something wrong, but I can’t get my 50g to correctly graph this simple f(x)=lx21l function. It graphs it as if the absolute value wasn’t there. I’ve tried everything I know, but nothing changes. My HP48GX graphs the right result…
What am I doing wrong? Could that be caused by a flag I set or unset?? Is it a bug? I don’t understand. Thanks for your help. Engineer & Senior IT Executive 2x HP41CL, HP41CX, HP48GX, HP50g, 2x82162A Printer, 2x82143A Printer, 2x HPIL, 2x CardReaders, PILBOX. 

08122021, 05:36 AM
Post: #2




RE: HP50g ABS value Graph
You wrote:
f(x)=lx21l Do you mean x*2 or is x2 a variable? I put in in the equation writer: Abs(x1) and it worked perfect. Abs(x*21) works as well. Abs(x21) has no effect at all. 

08122021, 05:39 AM
Post: #3




RE: HP50g ABS value Graph
(08122021 04:09 AM)Neve Wrote: I’m surely doing something wrong, but I can’t get my 50g to correctly graph this simple f(x)=lx21l function. It graphs it as if the absolute value wasn’t there. I’ve tried everything I know, but nothing changes. My HP48GX graphs the right result…That's a quite common problem. Make sure you have selected CAS setting "Rigorous" checked. If that option is nonchecked, calculator simplify 2x1 to 2x1. So it draws wrong graph. CAS setting Rigorous : Don't simplify x to X? S.Korean / 50G  fx570EX  200LX 

08122021, 05:45 AM
Post: #4




RE: HP50g ABS value Graph
(08122021 05:36 AM)rawi Wrote: You wrote: I mean f(x)=absolute value of x square 1 What result do you get? What I get is just the result of x square  1, the absolute value is not taken into account. Engineer & Senior IT Executive 2x HP41CL, HP41CX, HP48GX, HP50g, 2x82162A Printer, 2x82143A Printer, 2x HPIL, 2x CardReaders, PILBOX. 

08122021, 05:47 AM
Post: #5




RE: HP50g ABS value Graph
(08122021 05:39 AM)BINUBALL Wrote:(08122021 04:09 AM)Neve Wrote: I’m surely doing something wrong, but I can’t get my 50g to correctly graph this simple f(x)=lx21l function. It graphs it as if the absolute value wasn’t there. I’ve tried everything I know, but nothing changes. My HP48GX graphs the right result…That's a quite common problem. Make sure you have selected CAS setting "Rigorous" checked. THANK YOU!!! That was exactly the problem. Engineer & Senior IT Executive 2x HP41CL, HP41CX, HP48GX, HP50g, 2x82162A Printer, 2x82143A Printer, 2x HPIL, 2x CardReaders, PILBOX. 

08122021, 05:48 AM
(This post was last modified: 08122021 05:49 AM by 3298.)
Post: #6




RE: HP50g ABS value Graph
It's flag 119, "Rigorous" mode. Clear it and things should work again.
The calculator will simplify abouttobegraphed equations for performance reasons, and it uses the generic simplification routine also accessible to the user via commands, some parts of which are controlled by flags. This particular one also appears in the MODE > CAS settings form (last row, left edge of the screen; a few others only appear in the flag browser), where its hint is "Don't simplify X to X?". Edit: oh man, too late again... 

08122021, 06:30 AM
Post: #7




RE: HP50g ABS value Graph
(08122021 05:48 AM)3298 Wrote: It's flag 119, "Rigorous" mode. Clear it and things should work again. Don’t worry. Thank you for having taken the time to answer. Engineer & Senior IT Executive 2x HP41CL, HP41CX, HP48GX, HP50g, 2x82162A Printer, 2x82143A Printer, 2x HPIL, 2x CardReaders, PILBOX. 

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