HP Forums

Has anyone experience of the Sequence app. When I try to edit the 1st & 2nd elements of the sequence I can't access them.

If i remember correctly, it "hides" them unless your definition depends on the values. Put in something that used N-1 and/or N-2 and I think they an enabled.

(03-04-2015 06:16 PM)Tim Wessman Wrote: [ -> ]If i remember correctly, it "hides" them unless your definition depends on the values. Put in something that used N-1 and/or N-2 and I think they an enabled.

Yes, that works.

But if I append +U1(N-1)*U1(N-2)*0 to an expression previously without U(N-1 or 2) the numerical evaluation takes ages.

I have found other bugs/features that render the App useless, even in comparison with the 38g.

I could never believe how bad the 38G was, I always thought "Give it a try, you missed something" - but I hadn't, it really was awful.

The only use I have for the 38G is the Sequence App, which is slow, eats up memory, poorly legible...but not buggy.

A decline to the 39gii.

Try this on the 39gii:

HP38AscD 22 N² THEN LEAST UNLISTEDRUN SEQSET:
RECURSE(U,IFTE(N MOD 2,((N+1)/2)\178,U3(N/2)),1,2)\|>U1(N):
CHECK 1:
RECURSE(U,U6(N)*(1+U6(N)*(3+2*U6(N)))/6+U4(FLOOR(N/2)),1,3)\|>U2(N):
CHECK 2:
RECURSE(U,N+ROUND(\v/N,0),2,3)\|>U3(N):
RECURSE(U,U3(N)*(U3(N)+1)/2-U5(N)*(U5(N)+1)*(U5(N)+.5)/3,2,5)\|>U4(N):
RECURSE(U,FLOOR(\v/U3(N)),1,1)\|>U5(N):
RECURSE(U,CEILING(N/2),0,0)\|>U6(N):

ie Enter the expressions manually in the Sequence App & see how the machine stymies any attempt at evaluation.

Maybe it's just my buggy software version: it's 30/Oct/2013 19148.

Anyone know of a less buggy version?

(03-04-2015 08:01 PM)Gerald H Wrote: [ -> ]Anyone know of a less buggy version?

Yes, on Prime. :-|

(03-04-2015 08:29 PM)Tim Wessman Wrote: [ -> ]

(03-04-2015 08:01 PM)Gerald H Wrote: [ -> ]Anyone know of a less buggy version?

Yes, on Prime. :-|

Yes, the Prime Sequence App is better than on the 39gii.

However, the App that reproduces these two sequences

http://oeis.org/A137442

http://oeis.org/A167390

does not allow me to tick the Uns I want, which stubbornly remain unticked.

I've added the 3 attachments with .doc ending to reproduce the above sequences on the Prime & show inability of ticking U1 & U2.

Remove the .doc ending & download to Prime.

what became of the 39gii in the end? i've one sitting here that hp sent me for beta testing, but after that it seems to have faded into obscurity. the hardware seemed to be pretty ok, if a little light weight (a chunk of lead inside would have helped considerably).

mine ran very well on a single AAA cell, leading to the conclusion that the machine could have been shrunk down into quite a nice pocketable machine for surveyors / engineers / scientists (ie, become a modern HP-42Sii). the closest thing today in that form factor is the FX-5800P, and to some degree the WP-43s.

(03-05-2015 11:24 AM)robert rozee Wrote: [ -> ]what became of the 39gii in the end? i've one sitting here that hp sent me for beta testing, but after that it seems to have faded into obscurity. the hardware seemed to be pretty ok, if a little light weight (a chunk of lead inside would have helped considerably).

mine ran very well on a single AAA cell, leading to the conclusion that the machine could have been shrunk down into quite a nice pocketable machine for surveyors / engineers / scientists (ie, become a modern HP-42Sii). the closest thing today in that form factor is the FX-5800P, and to some degree the WP-43s.

Indeed. I have one in the drawer that I payed for.

Very fast, speed only exceded by bugginess & loopy organisation first instituted on the despised 38g.

Battery behaviour interesting, obvious course of development - forget it & find a rechargeable substitute.

All calculators stemming from 38G to be avoided.

If you're really interested in sequences, the 38G is redeemed &, I unwillingly admit, the Sequence App on the Prime is nearly as useful as on the 38G.

For

http://oeis.org/search?q=a004001&languag...&go=Search

This works on the 38G:

U1(1)=1
U1(2)=1
U1(N)=U1(U1(N-1))+U1(N-U1(N-1)).

On the Prime it refuses to get ticked.

Why?

(03-05-2015 11:24 AM)robert rozee Wrote: [ -> ]mine ran very well on a single AAA cell, leading to the conclusion that the machine could have been shrunk down into quite a nice pocketable machine for surveyors / engineers / scientists (ie, become a modern HP-42Sii). the closest thing today in that form factor is the FX-5800P, and to some degree the WP-43s.

I have been looking for exactly this kind of calculator, but unfortunately none existed. Yes the closet thing is the 5800P, but the "Pocket SE" model from the other brand is way more powerful, but unfortunately it is quite thick.

Honestly, will gladly pay $300 for an HP 39gII packed into a form factor of 5800P. And $400 into a form factor of 4500PA. I really do.

(03-12-2015 01:27 PM)factor Wrote: [ -> ]

(03-05-2015 11:24 AM)robert rozee Wrote: [ -> ]mine ran very well on a single AAA cell, leading to the conclusion that the machine could have been shrunk down into quite a nice pocketable machine for surveyors / engineers / scientists (ie, become a modern HP-42Sii). the closest thing today in that form factor is the FX-5800P, and to some degree the WP-43s.

I have been looking for exactly this kind of calculator, but unfortunately none existed. Yes the closet thing is the 5800P, but the "Pocket SE" model from the other brand is way more powerful, but unfortunately it is quite thick.

Honestly, will gladly pay $300 for an HP 39gII packed into a form factor of 5800P. And $400 into a form factor of 4500PA. I really do.

A 39gII or a 50g in a 5800P form factor does sound good. I wonder if the door on the 5800P would last longer than the 28S/19B since the 5800P has keys only one side.

(03-05-2015 06:42 AM)Gerald H Wrote: [ -> ]

(03-04-2015 08:29 PM)Tim Wessman Wrote: [ -> ]Yes, on Prime. :-|

Yes, the Prime Sequence App is better than on the 39gii.

However, the App that reproduces these two sequences

http://oeis.org/A137442

http://oeis.org/A167390

does not allow me to tick the Uns I want, which stubbornly remain unticked.

Although the 39gii works for indices up to 65536, double the range of the prime.