## Reproduction

# Dinosaur Size Distribution

This is exercise builds on Size Estimates by Name.

You want reproduce the analysis determining the distribution of body masses was
for dinosaurs originally performed by Gorman & Hone
2012. Gorman & Hone (2012) use
femur length (FL; the length of the upper leg bone) to estimate mass based on a
general power law equation `Mass = a * FL ^ b`

and the parameters vary by group:

*Ornithischia*: `a`

= `0.002`

and `b`

= `3.0587`

*Sauropodomorpha*: `a`

= `0.509`

and `b`

= `2.3459`

*Theropoda*: `a`

= `0.0007`

and `b`

= `3.1854`

Download the data,
estimate the mass of each species, and then make a histogram of these masses with
a logarithmically scaled size axis to reproduce their Figure 2a.

This should be done in a maximally automated way. The equations listed above
should only need be entered once and the code should automatically use the right
set of parameters based on the `Clade`

data to estimate the mass of each species.

[click here for output]