just type
x,numer;
at the input line.
rgds,
Paulo
On Thu, Feb 19, 2009 at 2:45 PM, Giovanni <giovannibis at inwind.it> wrote:
>
> gioved? 19 febbraio 2009, 11:02, Martin Sch?necker:
>
>> In your example, seems to be %pi that wants to retain its
>> exact/symbolic value. Maybe setting numer works for you:
>
> thanks for this info (and to Stefano too). I was not aware that numer
> was also a variable.
>
>> (%i1) numer;
>> (%o1) false
>> (%i2) tan((2*%pi)/9);
>> (%o2) tan((2*%pi)/9)
>> (%i3) numer: true;
>> (%o3) true
>> (%i4) tan((2*%pi)/9);
>> (%o4) 0.83909963117728
>
> You example is a almost what i need, but don't work if the variable
> is pre declared:
> (%i1) numer;
> (%o1) false
> (%i2) x:tan((2*%pi)/9);
> 2 %pi
> (%o2) tan(-----)
> 9
> (%i3) numer:true;
> (%o3) true
> (%i4) x;
> 2 %pi
> (%o4) tan(-----)
> 9
> (%i5) display(x)$
> 2 %pi
> x = tan(-----)
> 9
>
> It's possible to have a variable recalculated (or just displayed) in
> a numerical form?
>
> Thanks,
> Giovanni
>
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