title: What does Invoke a System Command means in R?
body: <p>I have following code to execute but I found that <code>system(eval</code> is working behind the scene. I want to know what does it do ? I have found one resource but it does not explain in detail!</p>
  
  <pre><code>cmd.command.line.input &lt;- "C:\Program Files\R\R-3.4.3\bin\R.exe" CMD BATCH C:\Users\myusername\Documents\R\Send_Outlook_Email.R"
  system(eval(cmd.command.line.input),intern=F,show.output.on.console = T,invisible=F)
  </code></pre>
  
  <p>R to execute but could not understand what does <code>system(eval</code> do ?</p>
  
  <p><a href="https://stat.ethz.ch/R-manual/R-devel/library/base/html/system.html" rel="nofollow noreferrer">https://stat.ethz.ch/R-manual/R-devel/library/base/html/system.html</a></p>