How to plot a shifted Gamma distribution

I have the parameters of a gamma distribution that I am trying to plot.
The parameters are shape = 2, scale = 5.390275 and the minimum value
x0 is 65.44945.

Since the gamma is shifted by x0, we have

Mean = shape*scale + x0 = 76.23

My question is, how can I do it in r?

I was trying to use dgamma function, but I saw no options to offset
the gamma distribution. I can only use the shape and scale parameters,
like this:

x <- seq(from=0, to=100, length.out=100)

plot(x, dgamma(x, shape=2, scale=5.390275),

      main="Gamma",type='l')

If all that is happening is that the distribution is the same as that
of a Gamma distribution with origin at 0, but simply shifted to the
right by an amount x0 (though I am wondering what context this could
arise in), then the commands

  x <- seq(from=0, to=100, length.out=100)
  x0 <- 65.44945
  plot(x+x0, dgamma(x, shape=2, scale=5.390275),
       main="Gamma",type='l')

will produce such a plot. However, I wonder if you have correctly
expressed the problem!

Ted.

This generates a distribution with origin equal zero, but I want the
origin to be x0

How can I handle shifted gamma distribution in r?

Thanks a lot!
Rodrigo.

-------------------------------------------------
E-Mail: (Ted Harding) <Ted.Harding at wlandres.net>
Date: 13-Feb-2014  Time: 17:27:29
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