title: unable to install c50 package in r in windows 10, i tried installing through the online .tar.gz files
body: <p>if i try to run </p>
  
  <pre><code>library('C50')
  </code></pre>
  
  <blockquote>
    <p>Error: package or namespace load failed for ‘C50’ in loadNamespace(i,
    c(lib.loc, .libPaths()), versionCheck = vI[[i]]):  there is no package
    called ‘libcoin’ ></p>
    
    <p>install.packages("C50", repos="http://R-Forge.R-project.org")
    Installing package into ‘C:/Users/balaj/OneDrive/Documents/R/win-library/3.4’
    (as ‘lib’ is unspecified)
    Package which is only available in source form, and may need compilation of C/C++/Fortran: ‘C50’
      These will not be installed</p>
  </blockquote>