Re: Suggestions for TI to improve their TI-89 / TI-92 calculators.
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Re: Suggestions for TI to improve their TI-89 / TI-92 calculators.
The ti 89 is an awesome calculator with a great basic
language built in. I can find a program to do just
about everthing that calculus or anyother class pretty
much needs. I would like a calculator that has more
memory of course even though the ti89 is generous with
the amout of memory is has. I also believe that
functions such as sec cot and csc and cos squared
should be built in, but other than that it is perfect.
I don't know if it is possible but a faster
programming source other than the slow basic to be
built in the ti89 would be nice
--- Stefano Bertolucci <sbertolucci@TIN.IT> wrote:
> Hi all,
>
> I would like to start a discussion about some
> suggestions to send TI for a
> future release of their Operating System.
> I think that if enough users agree on the
> suggestions they will be taken in
> serious consideration by the TI people.
> I would like if someone else could add to this list
> other points or simply
> agree with the ones I list.
> I don't want to overwhelm TI-Cares with a flood of
> messages, so if there is
> a wide response from you, I'll try to collect all
> the answers and foreward
> them in a single report to TI.
>
> Here are some points I make :
>
> 1) The when(..) function works only with real
> numbers, not with lists.
> This is in contradiction with the behaviour of the
> normal functions e.g.:
> the function f(x) = when(x > 1, 1, 0) can be applied
> only to scalars.
> If you try to apply it to a list it returns a scalar
> corresponding to f(x)
> applied to the first number of the list.
> So f(x) behaves differently to all the internal
> defined functions like
> sin(x).
> This can lead to misbehaviours in user defined
> functions.
> If I define something like g(x) = when(x>=0,
> sin(x), sin(-x)) I expect that
> with lists it behaves like sin(x), not differently
> (don't bother if the
> function is equivalent to sin(abs(x)), it is only an
> example).
> This in my opinion should be fixed in a future
> release of the OS.
>
> 2) It would be nice to have the help text displayed
> on the bottom row even
> when selecting a function from a menu.
> The available functions are so many that it is
> difficult to remember the
> exact syntax for all of them and it is impractical
> having to go to the
> CATALOG menu to get some help.
> The help row should be displayed also for the user
> defined functions
> provided they have the help text in the first row
> after the function
> definition as a comment as it already happens in the
> CATALOG F4 screen.
> The help text should be displayed also in CUSTOM
> menus.
> I think this should be easily obtained in a future
> release of the OS.
>
> 3) It would be nice in the CATALOG F3 menu, to have
> all the functions
> defined in a FLASH package grouped for package
> instead than in alphabetical
> order.
>
> 4) It would be nice to have the possibility of
> customizing the UNITS menu
> with other unit types (e.g., I would like to add
> something like a currency
> field with all the EURO conversions for the european
> community).
> It would be also nice to group all the units
> definitions in a special folder
> called UNITS. This could help to keep "cleaned" the
> MAIN folder.
>
> 5) It would be nice tho have a variable called
> something like PATH allowing
> to group in special folders some used defined
> functions and using them
> elsewhere without having to type the whole path.
>
>
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