search for: numericderic

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2005 Sep 25
2
getting variable length numerical gradient
Hi all. I have a numerical function f(x), with x being a vector of generic size (say k=4), and I wanna take the numerically computed gradient, using deriv or numericDeriv (or something else). My difficulties here are that in deriv and numericDeric the function is passed as an expression, and one have to pass the list of variables involved as a char vector... So, it's a pure R programming question. Have a nice sunday, Antonio, Fabio Di Narzo.