Felipe,
I have a statistical relationship in mind and I find it is convenient to
use Inkscape to create the graphs of what I think it should look like
under different conditions. Having done that, it would be nice to be
able to extract the formula for each curve that I have drawn. The curve
of the relationship that I am thinking of should have only a single y
value for each x coordinate, so it should be a function.
Thanks,
Phil.
> From: Felipe Sanches <felipe.sanches@...2592...> - 2009-01-30 02:02
> well.. maybe.
> it is a bezier curve. It is a parametric curve whose coordinates are
> defined by quadractic equations:
> x(t) = a*t² + b*t + c
> y(t) = d*t² + e*t + f
> finding the values of a,b,c,d,e and f involves looking at the
> coordinates of the control points of that curve and doing a bit of
> math
> Not all bezier curves can be described as 1 parameter functions,
> though... I think that it is indeed possible to do that with the one
> you provided since it appears to have a single y value for each x
> coordinate, thus it satisfy the requirements to be called a function.
> what are you trying to do with this math stuff?
> On Thu, Jan 29, 2009 at 10:14 PM, Philip Rhoades <phil@...2593...> wrote:
> > People,
>
> > Is there a way of extracting the formula for the curve from the
attached svg
> > ie in something resembling a conventional y = f(x) format?
>
> > Thanks,
>
> > Phil.
> --
> Philip Rhoades
>
> GPO Box 3411
> Sydney NSW 2001
> Australia
> E-mail: phil@...2593...
--
Philip Rhoades
GPO Box 3411
Sydney NSW 2001
Australia
E-mail: phil@...2067...