[R] using optimize with two unknowns, e.g. to parameterize a distribution with given confidence interval

[Ben Bolker]

David LeBauer <dlebauer <at> illinois.edu> writes:

> 
> Hi,
> 
> I would like to write a function that finds parameters of a log-normal
> distribution with a 1-alpha CI of (x_lcl, x_ucl):
> 
> However, I don't know how to optimize for the two unknown parameters.
> 

  Try optim instead.