Synth-DIY Yahoo! Groups Archives

RPN vs Algebraic

2009-04-25 by Michael

One thing confused me about the 50g. It's apparent schizophrenic agebraic vs RPN operation.

For example, I want to define a function. I see a stack, so I know I am in RPN mode. But I only see how to type it in as algebraic to define it.

Can someone clarify how this works?

Re: [50g] RPN vs Algebraic

2009-04-25 by Alun ap Rhisiart

On 25 Apr 2009, at 07:51, Michael wrote:

One thing confused me about the 50g. It's apparent schizophrenic agebraic vs RPN operation.

For example, I want to define a function. I see a stack, so I know I am in RPN mode. But I only see how to type it in as algebraic to define it.

Can someone clarify how this works?

I can understand that part, but I admit that as a long-time HP-41C user the emphasis on algebraic in the manuals is annoying. It means everything takes so long to explain, they always give the algebraic first (even though they have been careful to make RPN quicker, entering lists etc), and sometimes don't explain the RPN way at all. I can understand the commercial reasons for giving an algebraic mode, but could wish they didn't emphasise it so much.

However, in this case I think it does make sense. RPN means you don't wait till the end to evaluate things, you do it immediately with what is on the stack. If you want to enter an function or equation, however, you do want it to do everything at the end, and it also means you can readily check what you have in the display with what you want. Of course, if you programmed that function it would be more the RPN way.

At least, that's how I see it. In spite of my criticism on this, btw, I'm very impressed with the 50g, I hadn't expected so much beyond my old 41c.

Alun

Re: [50g] RPN vs Algebraic

2009-04-25 by Fatih Can

further support and sympathy to RPN mode from Turkey.

But can anybody help (or is there a way to undo) a process that is done wrongly? I could do it in Algebraic mode.

fatih

From: Alun ap Rhisiart <alunap@...>
To: 50g@yahoogroups.com
Sent: Saturday, April 25, 2009 11:54:38 AM
Subject: Re: [50g] RPN vs Algebraic

On 25 Apr 2009, at 07:51, Michael wrote:

One thing confused me about the 50g. It's apparent schizophrenic agebraic vs RPN operation.

For example, I want to define a function. I see a stack, so I know I am in RPN mode. But I only see how to type it in as algebraic to define it.

Can someone clarify how this works?

I can understand that part, but I admit that as a long-time HP-41C user the emphasis on algebraic in the manuals is annoying. It means everything takes so long to explain, they always give the algebraic first (even though they have been careful to make RPN quicker, entering lists etc), and sometimes don't explain the RPN way at all. I can understand the commercial reasons for giving an algebraic mode, but could wish they didn't emphasise it so much.

However, in this case I think it does make sense. RPN means you don't wait till the end to evaluate things, you do it immediately with what is on the stack. If you want to enter an function or equation, however, you do want it to do everything at the end, and it also means you can readily check what you have in the display with what you want. Of course, if you programmed that function it would be more the RPN way.

At least, that's how I see it. In spite of my criticism on this, btw, I'm very impressed with the 50g, I hadn't expected so much beyond my old 41c.

Alun

Re: [50g] RPN vs Algebraic

2009-04-25 by Fred Hoeldtke

Learn RPN...example l w h ** 'vol' sto

----- Original Message -----

From: Michael

To: 50g@yahoogroups.com

Sent: Saturday, April 25, 2009 2:51 AM

Subject: [50g] RPN vs Algebraic

One thing confused me about the 50g. It's apparent schizophrenic agebraic vs RPN operation.

For example, I want to define a function. I see a stack, so I know I am in RPN mode. But I only see how to type it in as algebraic to define it.

Can someone clarify how this works?

Re: RPN vs Algebraic

2009-04-25 by Juan C.

Hello Michael, let's be sincere, the hp-50g really works in RPN, In RPN you have to have the argument in the stack or command line before a function or command is executed and if you want to enter an expression or equation in RPN you have to enclosed by 'single quotation marks' the key associated with the letter O. Now if you want to define a function, let's say AREA(L,W)=L*W, you do this:
['] (ALG appears in the right upper corner of the screen)
then enter AREA(L,W)=L*W
you can now press [ENTER] and then [left-shift][DEF]