Re: [Maxima-discuss] scope of the function symbol used as a formal parameter

[Kris K. <kat...@gm...>]

On Tue, Sep 01, 2015 at 11:30:34AM +0100, Stanislav Maslovski wrote:
> Hi,
> 
> What should I do to avoid the following behavior?
> 
> (%i1) display2d: false;
> (%o1) false
> 
> (%i2) f(x) := x^2;
> (%o2) f(x):=x^2
> 
> (%i3) fun(f, x) := f(x);
> (%o3) fun(f,x):=f(x)
> 
> (%i4) fun(sin, x);
> (%o4) x^2
> 
> In %o4 I want sin(x), not x^2.
> 

Here is one way:

(%i1) f(x) := x^2$

(%i2) fun(f, x) := apply(f, [x])$

(%i3) fun(sin, x);
(%o3) sin(x)

Cheers,
Kris Katterjohn