in [HP48]

Prev: HP 50g + ROM 2.09
Next: HP calc. Customer Service
From: Scotty on 27 Aug 2006 11:08 On 26 Aug 2006 18:23:43 -0700, "JB" <wjbudd (a)yahoo.com> wrote:>I have a TI voyage 200 that I well satidfied with but I am curious >about the HP50g. If I get an HP 50g, after using the TI v200 >extensively, will I likely be disappointed in the quality of the HP >item or it's performance? Will the HP be similiar to use compared to >the TI or will it be an all new learning curve. I find the >construction quality and performance of the TI to both be flawless. >Will the HP be the same? How about the infamous keyboard problems? Or >major OS bugs? I have never used RPN, so is it necessary? What would >be a simple RPN example? Do you think there is an advantage to having >both calculators? I switched to Voiyage 200 from my 48GX because I wanted a CAS (I didn't know how to use the libs available for the 48GX--now I do). There are some interesting programs available for the V200, and I'll keep it around for that. For example, there's a great Calculus package (Calculus Made Easy)--but it eats up every bit of RAM and I can't have anything else on the calculator to run it--bummer. The larger screen was my real motivation. Plus, the equation writer--I didn't like the speed of the 48GX and the TI really shined there. I didn't even realize that HP had other models (49G, 49G+, etc.) until recently. I bought a 49G+ (late model with good keyboard) and was blown away by the CAS and the speed. Most importantly, I got my RPN back, plus a whole lot of functions that are sadly missing on the TI. As soon as the 50G came out with its serial port, I knew I finally had a 48GX replacement and purchased one immediately. I've not been so happy in a long time. I'm thrilled with this calc (50G). It's a major powerhouse. 2,300+ functions, real variable names, real directory structures, etc. The V200 was a major PITA to type in equations. My fingers would have to travel 2.32 light years to find the EE key. PI was cumbersome and misplaced and I found myself going from the left side of the keyboard to the right side continuously. After 10 hours of computing a day (homework, etc.), it became quite tiresome as I had to reduce 5-6 linear equations by hand using the equation writer. After I got my RPN back, my hands have never been happier. I may be the only one at University with an HP calculator, but I'll bet money that I'll be the one that achieves the solutions first <g>. RIP Voyage 200. You've been replaced by something soooo much better! Cheers, Scott
From: JB on 27 Aug 2006 12:00 Zeno wrote: > In article <1156641823.419972.220970 (a)b28g2000cwb.googlegroups.com>, JB> <wjbudd (a)yahoo.com> wrote:> > > I have a TI voyage 200 that I well satidfied with but I am curious > > about the HP50g. If I get an HP 50g, after using the TI v200 > > extensively, will I likely be disappointed in the quality of the HP > > item or it's performance? Will the HP be similiar to use compared to > > the TI or will it be an all new learning curve. I find the > > construction quality and performance of the TI to both be flawless. > > Will the HP be the same? How about the infamous keyboard problems? Or > > major OS bugs? I have never used RPN, so is it necessary? What would > > be a simple RPN example? Do you think there is an advantage to having > > both calculators? > > > The HP cals are much more accurate when compuitng Trig functions. > > An example, is to computer the SIN of exactly 3.141592654 (NOT Pi, but > the just given rounding of it) radians....the HPs get the correct > answer to 12 significant digits, while all other brand do not even come > close in accuracy. > > The correct answer is > -4.10206761537 E-10 > which only HPs give. What sort of application would require such accuracy ?
From: friend on 27 Aug 2006 12:49 On 27 Aug 2006 09:00:29 -0700, "JB" <wjbudd (a)yahoo.com> wrote:> >Zeno wrote: >> In article <1156641823.419972.220970 (a)b28g2000cwb.googlegroups.com>, JB>> <wjbudd (a)yahoo.com> wrote:>> >> > I have a TI voyage 200 that I well satidfied with but I am curious >> > about the HP50g. If I get an HP 50g, after using the TI v200 >> > extensively, will I likely be disappointed in the quality of the HP >> > item or it's performance? Will the HP be similiar to use compared to >> > the TI or will it be an all new learning curve. I find the >> > construction quality and performance of the TI to both be flawless. >> > Will the HP be the same? How about the infamous keyboard problems? Or >> > major OS bugs? I have never used RPN, so is it necessary? What would >> > be a simple RPN example? Do you think there is an advantage to having >> > both calculators? >> > >> The HP cals are much more accurate when compuitng Trig functions. >> >> An example, is to computer the SIN of exactly 3.141592654 (NOT Pi, but >> the just given rounding of it) radians....the HPs get the correct >> answer to 12 significant digits, while all other brand do not even come >> close in accuracy. >> >> The correct answer is >> -4.10206761537 E-10 >> which only HPs give. > >What sort of application would require such accuracy ? Amateur radio: Tracking satellites.
From: Paul Schlyter on 27 Aug 2006 13:43 In article <08j3f2t3dm6nnm9lhmvp9dp8sjru6de145 (a)4ax.com>,friend <digital (a)forever.com> wrote:>On 27 Aug 2006 09:00:29 -0700, "JB" <wjbudd (a)yahoo.com> wrote:> >> >>Zeno wrote: >>> In article <1156641823.419972.220970 (a)b28g2000cwb.googlegroups.com>, JB>>> <wjbudd (a)yahoo.com> wrote:>>> >>> > I have a TI voyage 200 that I well satidfied with but I am curious >>> > about the HP50g. If I get an HP 50g, after using the TI v200 >>> > extensively, will I likely be disappointed in the quality of the HP >>> > item or it's performance? Will the HP be similiar to use compared to >>> > the TI or will it be an all new learning curve. I find the >>> > construction quality and performance of the TI to both be flawless. >>> > Will the HP be the same? How about the infamous keyboard problems? Or >>> > major OS bugs? I have never used RPN, so is it necessary? What would >>> > be a simple RPN example? Do you think there is an advantage to having >>> > both calculators? >>> > >>> The HP cals are much more accurate when compuitng Trig functions. >>> >>> An example, is to computer the SIN of exactly 3.141592654 (NOT Pi, but >>> the just given rounding of it) radians....the HPs get the correct >>> answer to 12 significant digits, while all other brand do not even come >>> close in accuracy. >>> >>> The correct answer is >>> -4.10206761537 E-10 >>> which only HPs give. >> >>What sort of application would require such accuracy ? > >Amateur radio: Tracking satellites. Do you really have to compute sines accurate to 1E-21 in amateur radio? -- ---------------------------------------------------------------- Paul Schlyter, Grev Turegatan 40, SE-114 38 Stockholm, SWEDEN e-mail: pausch at stockholm dot bostream dot se WWW: http://stjarnhimlen.se/
From: Chuck Rushton on 27 Aug 2006 15:14
"friend" wrote > "JB" wrote: >> >>What sort of application would require such accuracy ? > > Amateur radio: Tracking satellites. > As an end result perhaps the 12-digit SIN is of questionable value, but as an intermediate result, sometimes even 12 digits are insufficient. An example taken from an ECEF (earth-centered earth fixed) conversion to/from XYZ coordinates and latitude/longitude/ellipsoid_ht .... 5GETLAM %%COS 4GETLAM %%CHS %%SIN %%* .... Without the 15-digit capability of the 49g+/50g, these conversions are unable to avoid the round-off error inherent even at 12 digits. Other examples also associated with geodesy and GPS are ITRF<->NAD conversions and Vincenty's Inverse and Forward calculations, to name a couple. Chuck Rushton PLS-NC |