**Challenge problem 2: Comparing GLS with independent contrasts regression in R**

Using contrasts regression and the method of phylogenetic GLS fit a linear model for the variables `wing`

and `Lnalt`

(that is `wing~Lnalt`

). Compare the two fitted models from these different methods. In what ways are they similar or different?

The files once again are:

*Written by Liam J. Revell. Last updated 11 December 2017*