I think that was why Barton recommended checking the UNLISP file;
those same warnings show up there too.
2009/5/22 Leo Butler <l.butler at ed.ac.uk>:
>
>
> On Fri, 22 May 2009, Martin Sch?necker wrote:
>
> < Joshua Stults schrieb:
> < > Hello,
> < >
> < > I'm trying to learn how to use compile_file(), but am having a bit of
> < > trouble.
> <
> < I have no experience with compliling either, but let's see: Firstly, it
> < seems that the compiler cannot handle the undefined function f, however
> < doing as maxima proposes:
> <
> < ?> Warning: f has a function or macro call which has not been translated
> < properly.
> < ?> The function was totaly undefined. Maybe you want to quote it.
>
> < explicit_fde(steps, deriv, f) := block([A, a_f, b, coef_list, fde,
> < func_vals, f_coefs, f_taylor, M, n, points, i],
>
> < ? ?);
> <
> <
> < (%i1) kill(all);
> < (%o0) done
> < (%i1) compile_file("m:/maxima/explicit_fde.mac");
> < Translation begun on #pm:/maxima/explicit_fde.mac.
> < See the `unlisp' file for possible optimizations.
> < Compiling m:/maxima/explicit_fde.LISP.
> < End of Pass 1.
> < End of Pass 2.
> < OPTIMIZE levels: Safety=2, Space=3, Speed=3
> < Finished compiling NIL.
> < (%o1)
> < [m:/maxima/explicit_fde.mac,m:/maxima/explicit_fde.LISP,m:/maxima/explicit_fde.UNLISP,#pm:/maxima/explicit_fde.o]
> < (%i2) explicit_fde([-2, -1,0,1,2], 1, f);
> < matrix([1,-(x0-x),(x0-x)^2/2,-(x0-x)^3/6,(x0-x)^4/24])
> < Is ?h ?positive, negative, or zero?p;
> < (%o2) -(f(x0+2*h)-8*f(x0+h)+8*f(x0-h)-f(x0-2*h))/(12*h)
>
>
> Interestingly, if you load the file and compile the function, you get
> extra information
>
> (%i1) load("maxima/scripts/compilef.mac");
>
> (%o1) "maxima/scripts/compilef.mac"
> (%i2) compile(explicit_fde);
>
> Warning-> x is an undefined global variable.
> Warning-> x0 is an undefined global variable.
> Warning-> h is an undefined global variable.
>
> ...
>
> Leo
> --
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> Scotland, with registration number SC005336.
>
>
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--
Joshua Stults
Website: http://j-stults.blogspot.com