A82: Accessing and changing stuff around in the VAT


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A82: Accessing and changing stuff around in the VAT




Hi guys.  I haven't been doing any programming in a long time, since my 
de-bugging of Blockbuster a couple of months ago.  I've been thinking 
that I'd like to do a math program -- symbolic differentiation.  I would 
like for the person to first enter the equation into Y=, and then the 
program prompts them which equation they want to differentiate (Y1, Y2, 
etc.), finds the contents of the equation, differentiates it, and spits 
it back out, possibly writing the derivitive in another equation 
variable, so they can graph it and everything.

Now, my question is, how would I go about accessing the contents of Y1  
or any of the other equation variables?  And then, how would I write a 
new equation into the VAT?

Thanks
Doug Torrance

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