Re: Hp 50g too young for the hp-museum? Message #27 Posted by peacecalc on 5 Mar 2012, 10:11 a.m., in response to message #19 by Bart (UK)
Hello Bart, hello Marcus
Your opinion is hard for me, because I love programming in user-RPL. But unfortunatly I feel that your antizipation might be come true, sooner, then i would like.
A missing feature would be, if there are no programming abilities,
how to work with functions wich are defined in several regions:
/
| x^2 for x <= 2
For example: f(x) = <
| 3*x for x < 2
\
Even it is programmable (with an if-then-else branching) in the Hp 50g, but you can't deriviate automatically, because the CAS don't recognize it.
With special functions I tried to solve the following problem:
If I have integral with a Delta-funktion (equiv. problem integrals with a Heaviside function, or the connection between the Delta function is the deriviat of the Heaviside function), then I programmed a special integrating-function (with the help of the MATCH command),
that handles the equation:
INT(A;B;f(X)*DELTA(X-Xo);X) = f(Xo)
Of course it's a very simple problem, and normally it's not worth typing in the integral and the keying for the program, but it shows where the problem is.
For me there would be a CAS-system useful, if it has the power "learning rules", than it might be not necessary for an programming language in a normal sense.
Sincerely
peacecalc
Edited: 5 Mar 2012, 11:40 a.m.
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