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HP Forum Archive 21

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[43S] Display and top row, refined
Message #1 Posted by Walter B on 22 Apr 2013, 1:46 a.m.

That's the state of the art now:

The menu LOG is displayed in the softkey sector.

d:-)

      
Re: [43S] Display and top row, refined
Message #2 Posted by Harald on 22 Apr 2013, 5:14 a.m.,
in response to message #1 by Walter B

I always stumble over LN1+x. There isn't enough space to put two brackets in, is there?

            
Re: [43S] Display and top row, refined
Message #3 Posted by Paul Dale on 22 Apr 2013, 5:18 a.m.,
in response to message #2 by Harald

I wonder why??

        (LN(1)) + x = 0 + x = x

Kind of pointless.

The LN(1+x) function is absolutely vital to producing correct results for many financial and statistical computations.

- Pauli

                  
Re: [43S] Display and top row, refined
Message #4 Posted by Harald on 22 Apr 2013, 9:07 a.m.,
in response to message #3 by Paul Dale

Pauli, of course I am aware that (LN1)+x would be completely pointless.
Still my brain would like to see LN(1+x) instead of LN1+x.

            
Re: [43S] Display and top row, refined
Message #5 Posted by Walter B on 22 Apr 2013, 5:35 a.m.,
in response to message #2 by Harald

Quote:
There isn't enough space to put two brackets in, is there?
Yes it isn't.

d:-)

                  
Re: [43S] Display and top row, refined
Message #6 Posted by David Hayden on 22 Apr 2013, 6:52 a.m.,
in response to message #5 by Walter B

What if you used the smaller font? Maybe LN(1+x) or ln(1+x)

                  
Re: [43S] Display and top row, refined
Message #7 Posted by Thomas Klemm on 22 Apr 2013, 7:27 a.m.,
in response to message #5 by Walter B

What about: x1+LN ?

                  
Re: [43S] Display and top row, refined
Message #8 Posted by C.Ret on 22 Apr 2013, 7:34 a.m.,
in response to message #5 by Walter B

What's about LNP1 such as on HP-28/48/49/50 soft keys ?

                        
Re: [43S] Display and top row, refined
Message #9 Posted by Ángel Martin on 22 Apr 2013, 9:01 a.m.,
in response to message #8 by C.Ret

LN+1
LNx+1

      
Re: [43S] Display and top row, refined
Message #10 Posted by Bill Carter on 22 Apr 2013, 12:00 p.m.,
in response to message #1 by Walter B

Walter-

It's looking very nice! Two questions:

1. Is there a symmetry (or other) reason for having x^2 as the primary function and SQRT as the yellow-shifted function instead of the opposite? I generally just do ENTER *. This is easy, and it's very rare (when I'm worried about losing something from the top of the stack) that I use x^2. In contrast, there's no way around SQRT.

2. I thought in the last thread you had settled on leaving the top row blank, rather than labeling them F1 ... F6. Maybe I'm mis-remembering, but I left that discussion contemplating how I might re-label (engrave?, paint?) the top row keys. "Factory" labels won't preclude that (unless the keys are double-shot!), just add a step.

-Bill

            
Re: [43S] Display and top row, refined
Message #11 Posted by Eric Smith on 22 Apr 2013, 2:53 p.m.,
in response to message #10 by Bill Carter

I agree that I'd much rather have sqrt as the unshifted function.

Some time back I requested that the top row keys have no legends, rather than F1..F6, but at the time I don't think anyone else expressed support for that idea.

                  
Yes, Sqrt rather than x^2 as unshifted
Message #12 Posted by gene wright on 22 Apr 2013, 3:32 p.m.,
in response to message #11 by Eric Smith

IMO of course.

                        
Just look at it
Message #13 Posted by Walter B on 23 Apr 2013, 2:02 a.m.,
in response to message #12 by gene wright

Just look at the new HP Prime keys. Of course that may be necessary though not sufficient.

d;-)

                              
Re: Just look at it
Message #14 Posted by gene wright on 23 Apr 2013, 11:32 a.m.,
in response to message #13 by Walter B

Hey, I expect you guys to fix the things HP gets wrong. :-)

                                    
Re: Just look at it
Message #15 Posted by Bill Carter on 23 Apr 2013, 2:07 p.m.,
in response to message #14 by gene wright

Yes, I'd say HP missed on that one. I'd be curious as to any reasoning for the change from past efforts (15C, 42S, 48G, 35s, etc.). To my thinking, they tinkered with something that worked and ended up with a less useful result.

-Bill

                                          
Re: Just look at it
Message #16 Posted by Tim Wessman on 23 Apr 2013, 3:18 p.m.,
in response to message #15 by Bill Carter

It makes sense if you are targeting students. x^2 unquestionably is used more there then sqrt based on all data I've ever examined.

Personally, I think it is stupid since it is just a ^ 2 but there you go.

                                                
Re: Just look at it
Message #17 Posted by gene wright on 23 Apr 2013, 3:45 p.m.,
in response to message #16 by Tim Wessman

And, Tim is almost certainly correct...for students.

Having two keys for x^2 and x^y pains me, but there you go. :-)

However, for the 43S, we face no such constraints! lol

                                                      
Re: Just look at it
Message #18 Posted by Bill Carter on 23 Apr 2013, 6:59 p.m.,
in response to message #17 by gene wright

OK, fair enough: it's one difference between a tool optimized for teaching/learning and a tool optimized for professional use.

Targeting the intended market makes sense in the case of the Prime and the 43S. HP will (hopefully) sell more Primes to students, while the 43S is targeted squarely at a small subset of professionals/enthusiasts who understand the other ways to get to x^2.

-Bill

            
Re: [43S] Display and top row, refined
Message #19 Posted by Reth on 23 Apr 2013, 10:27 p.m.,
in response to message #10 by Bill Carter

x^2 as primary is plain wrong for a RPN/RPL machine. Surely sqrt should be there.

      
Re: [43S] Display and top row, refined
Message #20 Posted by Eddie W. Shore on 23 Apr 2013, 9:26 a.m.,
in response to message #1 by Walter B

Looks good. The screen looks sharp.

      
Re: [43S] Display and top row, refined
Message #21 Posted by Walter B on 24 Apr 2013, 1:36 a.m.,
in response to message #1 by Walter B

Assume x^2 and SQRT swapped.

d:-)


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