Ti89 or HP 49G?

[MrPolite]

Which one do you prefer? a HP 49G or a Ti89 calculator? why?

and dont tell me you choose either one becuase of their price

[MOHH]

hey,

i have the ti89 and i love it, excellent graphing and menus ( ease of use) great for calculus

ps. don't take the cover off, i made that mistake, damn buttons went flying everywhere.. took me ages to figure out where that buttons what after.. hehe

regan

[MrPolite]

Originally posted by MOHH
hey,

i have the ti89 and i love it, excellent graphing and menus ( ease of use) great for calculus

ps. don't take the cover off, i made that mistake, damn buttons went flying everywhere.. took me ages to figure out where that buttons what after.. hehe

regan

hehe, my brother has a ti89 and I've worked with it a little bit.... just wondering if anyone has used a HP and also a Ti. I wanna know if I should buy a Ti or a HP?

[sbasak]

I used HP48G+ and found very good for engineering level maths.

But I never used TI.

[Bob Baddeley]

As an owner of both, I can easily say that the TI89 is WAY better than the HP 49G. They say the HP is more powerful, but I have never seen it do anything my TI couldn't do. Further, the TI is faster at doing things, there are more programs and games for it, it has a bigger display, and it's way easier to learn and understand. Reverse Polish Notation is cool sometimes, but not worth it. Go with the TI.

Oh, and HP stopped making calculators, so forget about anything new coming out for HP calculators.

All signs point to TI.

[cyborg]

i've got Ti89 and i love it!

[MrPolite]

Originally posted by Bob Baddeley
Oh, and HP stopped making calculators, so forget about anything new coming out for HP calculators.

didnt know that!

thanks for the info... I got an 89 now. I dont love it, but it loves me

[Guv]

I have an HP4GX and love it. I have not used the latest TI calculators, having decided to go with HP a long time ago due to a preference for the stack architecture.

The current TI calculators might be faster since my HP is several years old now. While the TI might have more games written for it, I would be surprised if it has any mathematical functions not available on the HP.

I prefer stack architecture in both computers and hand calculators. I am not sure that anybody makes computers with a stack architecture any more.

The stack architecture is far easier to use if you are not working with formulae written down on paper. When you try to do calculations from formulae in your head, you can easily get confused entering left & right parentheses. With a stack calculator, if you start off doing some calculations in the wrong sequence, you can recover by leaving the current values on the stack doing a few operations, and then using the values kept on the stack. If you mess up with algebraic notation, you have to start over again.

You do not have to understand reverse Polish to use a Stack calculator. You only have to understand reverse Polish if you are implementing a compiler.

The programming language provided by the HP is incredibly powerful.

As an example of a computation which shows off stack architecture, suppose you wanted to evaluate a cubic polynomial for one value of x, without using the built in polynomial evaluation function.

P(x) = ax³ + bx² + cx + d

On the HP, you would do the following.

Key in the value of x and hit the enter key three times. I never bother to count for this type of calculation. I hit the enter key a lot of times. Then do the following.

Key in the value of a following by *key
Key in value of b following by +key & *Key
Key in value of c followed by +key & *key
Key in value of d followed by +key
Value for P(x) is on the stack.

Aside from entering the numeric values, there are only 9 key strokes required. I do not think that an algebraic architecture calculator can do better.

The above computation evauates the following algebraic notation. .

[(ax + b)x + c]*x + d

If I do not write out the formula for a polynomial, I am never sure how many left parens to key in first when using an algebraic calculator. With the stack calculator, I just hit the enter key a lot without bother to count. If I did not use the enter key enough times, I can recover when I see that I need an extra value of x in the stack, without losing the calculations done so far. If you miscount the number of leading parens required, you have to start over when using an algebraic calculator.

If I cannot replace my HP when it is no longer functional, I will reluctantly go with a TI. If I discover that the TI is much faster, I might get one to run some fairly complex programs written for my HP, but will stick with the HP for hand calculations. Calculator speed does not mean anything for hand driven calculations, just as processor speed has little effect on how fast you can write a letter or a story using a Word processor.

[DiGiTaIErRoR]

Get a ti-92 plus. It makes an 89 look like a 83+.

[daryoush]

TI-89......hmmmmm, what is that??.......an airplane??....lol

:-D

I didn't get it......at last you got a TI or not?.....