title: Unable to install the package "png" on R, possible conflict with Anaconda?
body: <p>I'm trying to install the package "png" on RStudio but I get the following error, I run on Ubuntu 16.04:</p>
  
  <pre><code>     Error: package or namespace load failed for ‘png’ in dyn.load(file,
       DLLpath = DLLpath, ...):
  
       unable to load shared object '/home/doma/R/x86_64-pc-linux-gnu  
       library/3.4/png/libs/png.so':
  
       libpng16.so.16: cannot open shared object file: No such file or directory
  
       Error: loading failed
       Execution halted
  </code></pre>
  
  <p>I have installed Anaconda so I was wondering if it could be the problem, since the file libpng16.so.16 is actually installed in anaconda's libraries.
  Thank you!</p>