[R] Q. regarding optim()
N. Goodacre
ng296 at cam.ac.uk
Fri Jul 21 04:22:59 CEST 2006
Dear R mailing group,
The second parameter for the function optim()is a function whose
parameters are to be optimized. The description of this function given in
the help file is the following:
fn: A function to be minimized (or maximized), with first
argument the vector of parameters over which minimization is
to take place. It should return a scalar result.
Let's say the second argument is x, a vector of x values
I would have thought that fn should return a vector full of y values for
the x values entered as the second argument. If the function just takes one
value at a time and outputs a scalar, how can I specify for fn which x
value, of the vector x, to take?
Sincerely,
Norman Goodacre
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