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Re: Would you like to see more features dealing with the mathematics of calculators?

nova
(Web Page)

that's what calcs are for, right?
the only programs i write are math/science related.

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27 April 2000, 07:23 GMT














Re: Re: Re: Re: Re: Would you like to see more features dealing with the mathematics of calculators?

Paul Schippnick
(Web Page)

You said, "I think, the 89 and 92+ are also supersets of the 85 and 86. "
TI says, "The TI92 is not a superset of the TI85."
For example, variable names and program names in the TI82, TI83, TI83+, TI92, TI92+, TI89 are NOT case sinsitive and they are case sinsitive in the TI85 and TI86. But for more than this TI says:
"The TI85 has a differential equation graph mode, some extra linear algebra functions (eigenvalues,eigenvectors, LU decomposition, cond), and an interactive solver that are not included in the TI92 software. However, most of these features can be added to the TI92 through user defined functions and programs.
"The TI92 in addition has symbolic manipulation features, interactive geometry, a text editor, and 3D graphing, a statistics editor, matrix editor, and a function evaluation table."

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28 April 2000, 10:46 GMT

















Re: Re: Re: Re: Re: Re: Would you like to see more features dealing with the mathematics of calculators?

Chase
(Web Page)

Hmm...the TI89, at least, has eigenvector/eigenvalue functions (eigVc(), eigVl()) and LU decomposition (LU()). I don't think it has condition numbers, though. These are easy to add; the first thing you do is add the 1norm by writing:
max(seq([sigma](abs(a[x,y]), x,1,colDim(a)),y,1,rowDim(a))) > m1norm(a)
or the infinitynorm with:
max(seq([sigma](abs(a[x,y]), y,1,rowDim(a)),x,1,colDim(a))) > minfnorm(a)
or the Frobinius <sp> norm with:
[sigma]([sigma](a[x,y]^2, x,1,colDim(a)),y,1,(rowDim(a)) > mfnorm(a)
Substitute your favorite norm in the following expression for condition number:
m1norm(a)*m1norm(a^1)>mcond(a)
I don't know about the solver, though.

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29 April 2000, 18:43 GMT


Re: Would you like to see more features dealing with the mathematics of calculators?

L_Kishyak
(Web Page)

Hey nifty! 100% are for yes (at 12 votes though.)
and i'm getting a front seat on the board for once. i think it'd be nice if we could get some articles on advanced calculating with our TI's. right now, its breakfast time so I am going to leave and come eat later.
ps; don't go to my site, its a total waste (untill I fix it a bit)
The one and only
Steve

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27 April 2000, 12:54 GMT


Re: Would you like to see more features dealing with the mathematics of calculators?

rgdtad

I would not like to see more articles on the raw math, but on it's applications. SiCoDe has an applied trig in game making tutorial, and I would like to see some other things like that.

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27 April 2000, 15:27 GMT


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