It is uploaded: http://sagenb.org:8000/home/pub/139
On Tue, Jan 6, 2009 at 11:10 AM, William Stein <wst...@gmail.com> wrote:
>
> On Tue, Jan 6, 2009 at 8:06 AM, lfmartins <luizfelipe.mart...@gmail.com>
> wrote:
>>
>> What would be the best way, for students, to define functions of an
>> arbitrary (but fixed) number of variables?
>>
>> What I am using right now is a function:
>>
>> def makevars(prefix, n):
>> return var(' '.join([prefix+str(i) for i in range(n)]))
>>
>> So, for example:
>>
>> x=makevars('x',5)
>>
>> Creates the 5 variables (x0, x1, x2, x3, x4) and assigns then to x.
>> Then you can write stuff like:
>>
>> fexpr = sum(sin(v)^2 for v in x); fexpr
>>
>> and do calculus:
>>
>> diff(fexpr,x1)
>>
>> Is this a decent way to do it, or there is something predefined, and
>> I'm reinventing a wheel?
>
> That seems decent.
>
>> I wanted to put my worksheet on sagenb.org, but the server seems to be
>> down. I uploaded the .sws file to the group files.
>
> It's not down. You probably hit it during the minute a day when it
> takes a snapshot of its running state for security purposes. Please
> try again.
>
> -- William
>
> >
>
--
"The main things which seem to me important on their own account, and
not merely as means to other things, are knowledge, art, instinctive
happiness, and relations of friendship or affection."
-Bertrand Russell
L. Felipe Martins
Department of Mathematics
Cleveland State University
luizfelipe.mart...@gmail.com
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