On Sep 27, 5:53 pm, luisfe <lftab...@yahoo.es> wrote:
> On Sep 27, 3:34 pm, Johannes <dajo.m...@web.de> wrote:
>
> > Hi list,
> > is there a way to get a sum of fraction to a common devisor? or even
> > better into a product of a fraction like \frac{1}{something here} and a
> > sum of integers?
> > and my next step would be this, i dont have a single value, which i want
> > to get as the above produkt, but i've got a vector for wich i want to
> > write as produkt of a skalar times an integervektor.
> > how can i do this?
>
> > greatz Johannes
>
> Hi,
>
> Is this what you want?
>
> sage: v = vector([2/3,1/4,0])
> sage: common_denom = denominator(v)
> sage: common_denom
> 12
> sage: vector_of_nums = v * common_denom
> sage: vector_of_nums
> (8, 3, 0)
>
> note that here, internally, vector of nums is a vector with rational
> entries. If you want a vector of sage integers you could do
>
> sage: vector_of_nums = vector_of_nums.change_ring(ZZ)
>
> And you will have a vector with Integer entries, if you need this last
> command or not depends on what do you want to do with your vector.
>
> LuisOr to get it further simplified: sage: v = vector([2/3, 4/3, 4]) sage: c = reduce(QQ.content, v) sage: c 2/3 sage: v/c (1, 2, 6) -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
