title: How do I load data from another package from within my package
body: <p>One of the functions in a package that I am developing uses a data set from the <code>acs::</code> package (the <code>fips.state</code> object). I can load this data into my working environment via</p>
  
  <pre><code>data(fips.state, package = "acs"),
  </code></pre>
  
  <p>but I do not know the proper way to load this data for my function. I have tried</p>
  
  <pre><code> @importFrom acs fips.state,
  </code></pre>
  
  <p>but data sets are not exported. I do not want to copy the data and save it to my package because this seems like a poor development practice. </p>
  
  <p>I have looked in <a href="http://r-pkgs.had.co.nz/namespace.html" rel="noreferrer">http://r-pkgs.had.co.nz/namespace.html</a>, <a href="http://kbroman.org/pkg_primer/pages/docs.html" rel="noreferrer">http://kbroman.org/pkg_primer/pages/docs.html</a>, and <a href="https://cran.r-project.org/doc/manuals/r-release/R-exts.html#Data-in-packages" rel="noreferrer">https://cran.r-project.org/doc/manuals/r-release/R-exts.html#Data-in-packages</a>, but they do not include any information on sharing data sets from one package to another.</p>
  
  <p>Basically, how do I make a data set, that is required by functions in another  package available to the functions in my package?  </p>