general inverse solver?
The forms of equations are limited but its not limited to just one:
library(Ryacas)
Loading required package: XML
x <- Sym("x")
y <- Sym("y")
Solve(List(x+y == 2, x-y == 0), List(x, y))
[1] "Starting Yacas!" expression(list(list(x == 2 - y, y == 1)))
On Mon, Feb 9, 2009 at 7:45 PM, Carl Witthoft <carl at witthoft.com> wrote:
Gabor G a ecrit: Check out the Ryacas package. There is a vignette with some examples. ---- Which led me to the manuals for yacas itself. I'm guessing there may be a way to use yacas' "AND" construct to combine a few equations and then hope the Newton Solver can work with that, but it's not clear that will work. TK!Solver is nice because you aren't limited to linear equations, nor to equations which "fit" into a matrix structure, and because it's legal to have more than one unknown to be back-solved (assuming the problem is not under- or over-defined, of course).
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