HP49G+ Summation execution time
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From: JT on 1 Oct 2006 15:37 Is it just me or has one of the recent updates to the HP49G+ improved the speed of execution of summations ( using sigma notation )? I've been using the TI-V200 for summations of user-defined numeric functions because it was always faster than the HP... now I notice the situation is reversed - a welcomed surprise!
From: John H Meyers on 2 Oct 2006 16:31 On Sun, 01 Oct 2006 14:37:02 -0500, JT wrote: > Is it just me or has one of the recent updates to the HP49G+ improved > the speed of execution of summations ( using sigma notation )? If you formerly specified numbers as integers (without decimal points) and now are using real numbers (with decimal points, automatically so when entering expressions in Approximate mode), then it's just you :) [r->] [OFF]
From: JT on 3 Oct 2006 00:11 The summations involve real numbers and in fact the user-defined functions used in the summations were the same functions as before the HP49G+ OS upgrades since they were backed up on the SD card. Modes and flags are the same since I specify them from a file FLGS in STARTUP. The V-200 summations are identical and have not changed since they are archived and backed up. My assumption was that there was some improvement in the 49G+'s OS with the upgrades to speed up some operations but I could be mistaken. I'll double-check execution times using integers instead of real numbers. You know, there's the possibility ( but not likely ) that the V-200 is slower now after its upgrade. :-) Either way I'm at a loss to explain it but am very happy about it anyway! I know the summation since I've used it a lot and I know it took about 30 sec on the V-200 and longer on the HP49G+. Now I find the HP49G+ finishes that same summation in about 8 or 9 sec ( using TEVAL ). I've never used any over-clocking software on the 49G+. The HP50G is looking nicer and nicer all the time; I've been very impressed with the improvements made in the OS since I first got the 49G+. I have an early model so I'm careful with the keyboard. John H Meyers wrote: > On Sun, 01 Oct 2006 14:37:02 -0500, JT wrote: > > > Is it just me or has one of the recent updates to the HP49G+ improved > > the speed of execution of summations ( using sigma notation )? > > If you formerly specified numbers as integers (without decimal points) > and now are using real numbers (with decimal points, automatically so > when entering expressions in Approximate mode), then it's just you :) > > [r->] [OFF]
From: Jean-Yves Avenard on 3 Oct 2006 01:16 Hi JT wrote: > You know, there's the possibility ( but not likely ) that the V-200 > is slower now after its upgrade. :-) Either way I'm at a loss to more likely the explanation in fact the summation has been made slightly slower over the years on the 49g+ has issues had been fixed. ROM 2.10 will provide a fix for most of the issues remaining with summation (such as doing sum of sum). At the expense of speed unfortunately JY
From: JT on 3 Oct 2006 07:32
Thanks JY... there is one other possibility. I've only used HP calculators and RPN for a couple years, so probably it was some fault of mine - not operating the calc correctly. What I'm finding with HP calculators is that they have many many tools built-in but it's very easy to misuse them, causing improper operation ( not the calculator's fault ). With time and practice, these problems go away as one gets used to HP and RPN and the calculator begins to work a whole lot better! Jean-Yves Avenard wrote: > Hi > JT wrote: > > You know, there's the possibility ( but not likely ) that the V-200 > > is slower now after its upgrade. :-) Either way I'm at a loss to > more likely the explanation > > in fact the summation has been made slightly slower over the years on > the 49g+ has issues had been fixed. > > ROM 2.10 will provide a fix for most of the issues remaining with > summation (such as doing sum of sum). At the expense of speed unfortunately > > JY |