title: Error in loadNamespace(i, c(lib.loc, .libPaths()), versionCheck = vI[[i]]) : there is no package called 'stringi'
body: <p>When I use</p>
  
  <pre><code>library(Hmisc)
  </code></pre>
  
  <p>I get the following error</p>
  
  <pre><code>    Error in loadNamespace(i, c(lib.loc, .libPaths()), versionCheck = vI[[i]]) : there is no package called 'stringi'
      Error: package 'ggplot2' could not be loaded
  </code></pre>
  
  <p>As well, if I use </p>
  
  <pre><code>library(ggplot2)
  </code></pre>
  
  <p>I get the following error</p>
  
  <pre><code>    Error in loadNamespace(i, c(lib.loc, .libPaths()), versionCheck = vI[[i]]) : there is no package called 'stringi'
      Error: package or namespace load failed for 'ggplot2'
  </code></pre>
  
  <p>I've tryed to install 'stringi'
      install.packages("stringi")</p>
  
  <p>But at some point, during the installation, I get the following error message:</p>
  
  <pre><code>    configure: error: in `/private/var/folders/pr/wdr5dvjj24bb4wwnjpg1hndc0000gr/T/RtmpeQ5pXk/R.INSTALL10b94a012cab/stringi':
      configure: error: no acceptable C compiler found in $PATH
      See `config.log' for more details
      ERROR: configuration failed for package 'stringi'
      * removing '/Library/Frameworks/R.framework/Versions/3.2/Resources/library/stringi'
  </code></pre>
  
  <p>I'm using RStudio (Version 0.99.447) and I have R version 3.2.1.</p>