Richard Hennessy <rich.hennessy <at> verizon.net> writes:
>
> Try putting ''() around the diff or integrate when defining functions. Then
it will work because the
> function get assigned the
> result of the diff or integrate instead of doing it, the calculation, later.
>
I see, but very hard to code in this way.
I found
define(df(x),diff(f(x),x));
df(1); %, numer;
works as expected ...
Gru? HW