Question about CAS and Graphing

[Gerald H]

(11-24-2014 04:37 PM)CR Haeger Wrote:  Back to the OP...

Normally, if I work in CAS and end up creating function(s) that I want to plot in Function APP, then I:

1. Save the function using say f(x):=x^2 etc... // creates a CAS program f()

2. Save f(x) into Function.F1 using Function.F1:=f //Note: can use F1:=f if you are already in Function App

3. Symb view in Function App should have F1(X): function with capital Xs.

If the functions being worked on in CAS are pretty long, I like to assign them to f(x), g(x) etc. early on as it is easier to type (or use Vars/CAS/Program to select).

This works in reverse as well. Say I have been plotting functions F1, F2 etc. and want to send to CAS. In CAS I can use f(x):=F1(x), which stores F1 into f using lower case x. I can also use F1(x) directly in CAS.

Finally, to make this even quicker and reduce keying errors, I setup a few USERKEYs to prefill the CAS command line. See attachment for an example program.



Best,
Carl

PS - Han and others have been great teachers for those of us learning how to use the Prime hard and software.

Great teachers spend time demonstrating how to use calculator with the best result that you are proficient in its use.

I would be impressed with the learners proficiency if some unexpected task could be well solved in a reasonable time.

So: as far as I know, no one has improved on the inbuilt integer factorization programme? Perhaps an adept could produce an elliptic curve method integer factorizing programme that betters & increases the range of factored numbers. Perhaps a lattice point counting programme at the same time?