Re: [Maxima-discuss] Maxima (lisp on Mac) - heap exhausted

[Gunter K. <gu...@pe...>]

On windows I seem to remember that you can use a whole gigabyte before maxima gives up. This could mean you are dealing with numbers that might exceed any amount of RAM your computer might have installed.

If you just want to know the length of the result of the calculation you might want to calculate a logarithm of the result: the logarithm atva base of ten tells you how many digits a number needs.
If your problem is that you want to keep too many but numbers in memory you might want to look at the nolabels flag, too.


On 23. April 2014 20:11:26 MESZ, Richard Fateman <fa...@be...> wrote:
>what do you plan to do with a number raised to the  power 60,000,000?
>
>If you are computing it in order to then reduce it modulo some other
>number,
>then there is a better way to do it.
>
>
>
>On 4/23/2014 6:34 AM, Scott Hughes wrote:
>>
>> Firstly, I'm not a programmer and only recently started to use Maxima
>
>> (command line). I don't know anything about lisp. I'm running Maxima 
>> on a Mac but also on a PC through Windows. Both are the command line 
>> version.
>>
>> I only need to use Maxima for a few basic operations, primarily small
>
>> numbers raised to large (at least 8) exponents. Aside from that, I'm 
>> using the round and asksign commands.
>>
>> I'm encountering "heap exhausted" errors once my exponents get beyond
>
>> about 60 000 000 and have looked in manual and forums for help. There
>
>> is reference to changing heap size but I didn't understand the
>command 
>> or even how to enter it. Can anyone help me with very explicit 
>> instructions ?  I'm not concerned with the length of time the 
>> calculations take, just don't want them to crash before they
>complete.
>>
>>
>
>
>
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