A89: user functions


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A89: user functions




Hello!

Do any of you alpha testing the SDK know if there is going to be support for 
user functions (to return a value to TI-BASIC). Say I wanted to write a 
function for multivariable implicit differentiation...a simple example:

v = r+s, find dv/dt,dr/dt,and ds/dt

answer: dv/dt = dr/dt+ds/dt (I think that's right,been too long since Cal I 
=P)

I know that is a rather simple example, but to do this process in TI-BASIC 
is pretty ugly (the code, the result comes out like d(r(t),t),etc).

There would be a lot that could be done if that support was included (say, 
an Isolate function, like Maple) that is impossible in TI-BASIC. I know that 
TI-GCC comes with that support, but it is limited by the TIOS (i've had it 
crash with the example given documentation =(, but Zeljko is still the 
TI-GCC God =) ). Can anyone say anything about this, or does your NDA 
prohibit it?

Thanks,
Michael Cowart
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