Dear R-users,

I would like to know if there is any way to constraints optimized parameters
using the function lm, glm or others that are written in the form:
Lm( formula, data ...)
As I understand, formula are of the type y ~ X1 +X2+ ... Xi (where Y, X1, X2
..Xi are vectors). In my case I would like the estimates of this linear
combination computed with lm to be positives.
I haven't found anything about it in the documentation, I would like to use
the lm.ridge function with positives estimates.
Would anyone have already met this problem ?

Thank you,

   Emmanuel

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