Re: [R] solving equation

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From: Spencer Graves (spencer.graves@pdf.com)
Date: Fri 14 May 2004 - 08:37:47 EST


Message-id: <40A3F8BB.3050607@pdf.com>


      Have you considered making contour plots, e.g., using "contour"?
See also Venables and Ripley, Modern Applied Statistics with S.

      Your function is a parabola opening up. For this, you can obtain
the axes of the ellipse, etc., using eigen. The eigenvalues can then
tell you how far out in these axes you can go.

      hope this helps. spencer graves

Eduardo Dutra de Armas wrote:

>Dear R-users,
>
>I'm trying to solve the following equation, to get a set of values
>satisfying it and I'd like to know if its possible to do that in R.
>
>0.85*(54.6-X)^2 + 4.65*(25.2 - Y)^2 -2*0.84*(54.6-X)*(25.2-Y) <= 8.29
>
>Thanks a lot,
>
>Eduardo Armas
>
>
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