title: How to extract elements that include $ sign from a character vector
body: <p>Suppose that R output is as the following:</p>
  
  <pre><code> &gt; website.fund.chvec1
  
    [1] ""         "LOGIN"          "or"             "SIGN"           "UP "          
        ""         "The"            "Team:"          ""              
   [10] "$74,810"  "TOTAL"          "RAISED"         "SO"             "$14,530"      
  </code></pre>
  
  <p>I want to extract every element that includes <code>$</code> sign from the character vector <code>website.fund.chvec1</code>. Is there anyway to do it? I mean, besides <code>website.fund.chvec1</code>, I also have <code>website.fund.chvec2</code>, <code>website.fund.chvec3</code>, etc, and the index of elements including the <code>$</code> sign is not always 10 and 14....</p>
  
  <p>Thank you :)</p>