Derivative as a function



On Thu, Oct 21, 2004 at 10:51:23PM +1000, Billinghurst, David (CALCRTS) wrote:
> > From:  Nikos Apostolakis
> > Sent: Thursday, 21 October 2004 9:02 PM
> > To: maxima@math.utexas.edu
> > Subject: Derivative as a function
> > 
> > Hello
> > 
> > is there a way to define a function to be the derivative of an
> > other function?
> > 
> > (%i43) f(x):=x^2$
> >
> 
> Have a look at define()
> 
> (%i1) f(x):=x^2;
>                                            2
> (%o1)                             f(x) := x
> (%i2) define(derf(x),diff(f(x),x));
> (%o2)                           derf(x) := 2 x
> 

Ok, that seems to do it.  

Thanks a lot.  Thanks to Albert for his helpful reply to.

Nikos