A) The package ggplot2

Install the R package ggplot2. You can do this by running the function install.packages() from an R environment, as follows:

install.packages("ggplot2")

If the install was successful, you should see something like:

The downloaded binary packages are in
	/var/folders/dx/qk620qcx25dgv4d1rdpkyxmm0000gq/T//RtmpoawwXe/downloaded_packages

B) Visualizing data from tables

Read the piece below consisting of an extract of the metadata from the data set analyzed in the research paper Plant and small-mammal responses to large-herbivore exclusion in an African savanna: five years of the UHURU experiment, by Kartzinel et al. 2014, published in the journal Ecology, and answer:

  1. How many Principal Investigators are mentioned in the metadata description?
  2. What does the term UHURU stand for?
  3. Where does the experiment take place?
  4. How many experimental treatments are mentioned in the metadata abstract?