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From: Don on 1 Dec 2007 20:06
Finally have time to really learn my calculators. I want to learn to
program them since one of them is always with me and my computer is
not. I want to program for the math problems in some of the math
problem books. I don't know weather to use sys RPL, user RPL, or
C on the computer and transfer over to calculator. I intend to
learn the HP-50 and the HP-35s. Thanks for your time and efforts.

Don
From: mnhollinger on 1 Dec 2007 22:56
On Dec 1, 8:06 pm, Don <dtfos...(a)dcn.davis.ca.us> wrote:
> Finally have time to really learn my calculators. I want to learn to
> program them since one of them is always with me and my computer is
> not. I want to program for the math problems in some of the math
> problem books. I don't know weather to use sys RPL, user RPL, or
> C on the computer and transfer over to calculator. I intend to
> learn the HP-50 and the HP-35s. Thanks for your time and efforts.
>
> Don

I would start by using user RPL and see if that meets your needs. Why
don't you download the HP-50 manual and look at the vast set of
commands available to you. You can do a lot with the user RPL so
don't be too anxious to learn sys RPL or assembly language and take
your precious time away from your math problems.
From: Irl on 2 Dec 2007 07:10
On Dec 1, 10:56 pm, mnhollin...(a)yahoo.com wrote:
> On Dec 1, 8:06 pm, Don <dtfos...(a)dcn.davis.ca.us> wrote:
>
> > Finally have time to really learn my calculators. I want to learn to
> > program them since one of them is always with me and my computer is
> > not. I want to program for the math problems in some of the math
> > problem books. I don't know weather to use sys RPL, user RPL, or
> > C on the computer and transfer over to calculator. I intend to
> > learn the HP-50 and the HP-35s. Thanks for your time and efforts.
>
> > Don
>
> I would start by using user RPL and see if that meets your needs. Why
> don't you download the HP-50 manual and look at the vast set of
> commands available to you. You can do a lot with the user RPL so
> don't be too anxious to learn sys RPL or assembly language and take
> your precious time away from your math problems.

I absolutely agree about UserRPL as a starting point; I never use
SysRPL for the math stuff I do, which involves a lot of 3D vector
calculus, Gaussian beam propagation, some lens design... but mainly
it's a diverse and changing set. If I really needed to do lens design
on the HP50, could I write a ray-tracer in SysRPL that would run
faster than the one in UserRPL? Well, it would take a significant
amount of learning to get facile in SysRPL, and since the underlying
operations (square roots, trig functions) are already time-intensive
and exist in "native mode" (imprecise term, sorry), the basic
calculations would not be much faster. On the other hand, if you
wanted to write an efficient function to generate, say, the plasma
dispersion function from series approximations, where the basic
operations are 4-function but there are a lot of them, then it would
be a lot faster in SysRPL, I think.
But learn the UserRPL first! Until you can use that effortlessly you
won't really know whether SysRPL is needed...unless you're just
looking for an excuse to learn a (nother) cool programming language,
in which case I'm discussing the wrong subject!
--Irl
From: Don on 2 Dec 2007 16:44
On Sun, 2 Dec 2007 04:10:57 -0800 (PST), Irl <irl1(a)mindspring.com>
wrote:

>On Dec 1, 10:56 pm, mnhollin...(a)yahoo.com wrote:
>> On Dec 1, 8:06 pm, Don <dtfos...(a)dcn.davis.ca.us> wrote:
>>
>> > Finally have time to really learn my calculators. I want to learn to
>> > program them since one of them is always with me and my computer is
>> > not. I want to program for the math problems in some of the math
>> > problem books. I don't know weather to use sys RPL, user RPL, or
>> > C on the computer and transfer over to calculator. I intend to
>> > learn the HP-50 and the HP-35s. Thanks for your time and efforts.
>>
>> > Don
>>
>> I would start by using user RPL and see if that meets your needs. Why
>> don't you download the HP-50 manual and look at the vast set of
>> commands available to you. You can do a lot with the user RPL so
>> don't be too anxious to learn sys RPL or assembly language and take
>> your precious time away from your math problems.
>
>I absolutely agree about UserRPL as a starting point; I never use
>SysRPL for the math stuff I do, which involves a lot of 3D vector
>calculus, Gaussian beam propagation, some lens design... but mainly
>it's a diverse and changing set. If I really needed to do lens design
>on the HP50, could I write a ray-tracer in SysRPL that would run
>faster than the one in UserRPL? Well, it would take a significant
>amount of learning to get facile in SysRPL, and since the underlying
>operations (square roots, trig functions) are already time-intensive
>and exist in "native mode" (imprecise term, sorry), the basic
>calculations would not be much faster. On the other hand, if you
>wanted to write an efficient function to generate, say, the plasma
>dispersion function from series approximations, where the basic
>operations are 4-function but there are a lot of them, then it would
>be a lot faster in SysRPL, I think.
>But learn the UserRPL first! Until you can use that effortlessly you
>won't really know whether SysRPL is needed...unless you're just
>looking for an excuse to learn a (nother) cool programming language,
>in which case I'm discussing the wrong subject!
>--Irl
Thank you for your responses. I am not trying to re-invent the wheel,
just have fun. I also like to try to keep up with conversations in
this news group, but it seems like some go a whole lot deeper than
user RPL and that was why I posed the question. Thanks again.

Don
From: Paul Schlyter on 3 Dec 2007 02:43
In article <hc96l31dfsf9g8vkllqaja3aq458tcrq1m(a)4ax.com>,
Don <dtfoster(a)dcn.davis.ca.us> wrote:

> Thank you for your responses. I am not trying to re-invent the wheel,
> just have fun.

Reinventing the wheel and having fun are not mutually exclusive. It
can be a lot of fun to reinvent some wheel somewhere - and it can be
quite educational too! So reinventing some wheel is OK, as long as
you know what you're doing.

--
----------------------------------------------------------------
Paul Schlyter, Grev Turegatan 40, SE-114 38 Stockholm, SWEDEN
e-mail: pausch at stockholm dot bostream dot se
WWW: http://stjarnhimlen.se/
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