Not sure I entirely understand your problem.
It sounds as though you want to save the expressions *as text* (not as
internal objects of some kind) and then re-enter them into Maxima later.
You can use string(...) for that.
Or do you want to do all this *within the same Maxima session*? In that
case, you can do something like this:
xxx1 : <<my very complicated calculation dependent on parameter P>>
xxx1a: subst(3,P,xxx1)$
xxx1b: subst(23/3,P, xxx1)$
Is that what you need? It isn't very clear....
-s
On Mon, Apr 18, 2011 at 23:03, razif razali <razif66 at gmail.com> wrote:
> i got this kind of code
> -----------------------------------
>
> *f[n,k] := concat('f_,n,"_",k)(s)$*
>
> *df[n,k] :=*
>
> * if n=0 then 0 *
>
> * else
> 'diff(f[2*n,k],s)=%psi*((k-1)*sqrt(n-k+2)*f[2*n,k-1]-k*sqrt(n-k+1)*f[2*n,k+1])$
> *
>
> *atvalue(f_4_2(s),s=0,0)$*
>
> *atvalue(f_4_3(s),s=0,0)$ *
>
> *makelist( df[2,k],k,1,3);*
>
> *desolve(%, makelist(f[4,k],k,1,3) );*
>
> *nonzero;*
> *-----------------------*---------------------------
> this code give me 3functions which is f_4_1(s) , f_4_2(s) and f_4_3(s) .
> what I want to do is to plot this functions for different %psi and s. For
> this small problem I can just rewrite the functions I get in maxima and plot
> it, but for higher problem, one function give me almost 15lines of equation
> and its takes time for me to rewrite each function and plot it. to rewrite
> such functions also not practical because it will have some human error in
> rewrite those large functions.
>
> I try use stringout command but it just give me input command that I invoke
> in maxima, i try to use writefile but it gives me output that I can't use to
> reuse to plot or change the %psi and s value. I try to use save command but
> i failed to understand how to use it..it always give me this error
>
> -----------------------
> *save(savelaaa,all);*
> *save: first argument must be a string; found: savelaaa*
> * -- an error. To debug this try: debugmode(true);*
> ------------------------
>
>
>
> On Tue, Apr 19, 2011 at 9:15 AM, razif razali <razif66 at gmail.com> wrote:
>
>> How to use save arguments?when I invoke this command in maxima '
>> save(test,all) ' it gives me this
>> -----------------------
>> save(savelaaa,all);
>> save: first argument must be a string; found: savelaaa
>> -- an error. To debug this try: debugmode(true);
>> ------------------------
>> how to save my input and output in maxima?
>>
>>
>> On Tue, Apr 19, 2011 at 12:05 AM, Leo Butler <l.butler at ed.ac.uk> wrote:
>>
>>>
>>>
>>> On Mon, 18 Apr 2011, razif66 at gmail.com wrote:
>>>
>>> <
>>> < Sent from my BlackBerry? wireless device via Vodafone-Celcom Mobile.
>>> <
>>> < -----Original Message-----
>>> < From: razif66 at gmail.com
>>> < Date: Mon, 18 Apr 2011 15:45:46
>>> < To: Leo Butler<l.butler at ed.ac.uk>
>>> < Reply-To: razif66 at gmail.com
>>> < Subject: Re: [Maxima] latex to maxima code (fwd)
>>> <
>>> < Thanks leo,i try used stringout(a,all) command and it save all input
>>> command that I gave in maxima...but how to save the output one?so that I can
>>> used the output file for next computation?
>>>
>>> You can find help in Maxima on a topic T by entering
>>>
>>> ? T
>>>
>>>
>>> E.g.
>>>
>>> ? save
>>>
>>> <snip>
>>>
>>> The special form `save (<filename>, all)' stores the current state
>>> of Maxima. This includes all user-defined variables, functions,
>>> arrays, etc., as well as some automatically defined items. The
>>> saved items include system variables, such as `file_search_maxima'
>>> or `showtime', if they have been assigned new values by the user;
>>> see `myoptions'.
>>>
>>>
>>> I think this is what you want.
>>>
>>> Leo
>>> --
>>> The University of Edinburgh is a charitable body, registered in
>>> Scotland, with registration number SC005336.
>>>
>>>
>>
>>
>> --
>> Regards,
>>
>> RAZIF RAZALI,
>> Tutor & Master Student,
>> Physics Department,
>> Faculty Of Science,
>> Universiti Teknologi Malaysia(UTM).
>> +60199393606
>>
>>
>>
>>
>
>
> --
> Regards,
>
> RAZIF RAZALI,
> Tutor & Master Student,
> Physics Department,
> Faculty Of Science,
> Universiti Teknologi Malaysia(UTM).
> +60199393606
>
>
>
>
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