Ben,

Say you have some variable (x) ~ exp f(x|lambda,theta) where f(x|lambda,
theta) = lamba*(e^(minus lambda*(x-theta)))

Lambda is the inverse scale parameter and theta is a location parameter (I
erred in calling theta a shape parameter in the original question).

John

On Mon, Jan 11, 2010 at 4:23 PM, Ben Bolker <bolker@ufl.edu> wrote:

> John Westbury <jrwestbury <at> gmail.com> writes:
>
> >
> > Hello,
> >
> > I am new to R and am trying to figure out how to specify an exponential
> > distribution with scale and shape parameters.  I can specify an
> exponential
> > distribution with an inverse scale but would like to know how to specify
> the
> > distribution with a shape parameter as well.
> >
> > thanks much,
> >
> > John
> >
>
>   Do you mean a gamma distribution?  I'm unfamiliar with any
> definition of the exponential distribution with more than one
> parameter.  Can you point to a reference/example somewhere?
>
>  Ben Bolker
>
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