[R] linear constrained optimization in R

[sammyny]

I am trying to use
http://rss.acs.unt.edu/Rdoc/library/stats/html/constrOptim.html in R to do
optimization in R with some given linear constraints but not able to figure
out how to set up the problem.

For example, I need to maximize $f(x,y) = log(x) + \frac{x^2}{y^2}$ subject
to constraints $g_1(x,y) = x+y < 1$, $g_2(x,y) = x > 0$ and $g_3(x,y) = y >
0$. How do I do this in R? This is just a hypothetical example. Do not worry
about its structure, instead I am interested to know how to set this up in
R.

thanks!

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