lass="op">)</span></code></pre></div>
    </div>

    <div id="format">
    <h2>Format</h2>
    <p>An object of class <code>list</code> with two fields;</p><dl><dt>bg_img</dt>
<dd><p>a matrix containing raw pixel representation of an image of a football
  field (usefull for plotting payers).</p></dd>

  <dt>positions</dt>
<dd><p>An R data.frame with 36 rows and 3 columns describing position, x and y axis on the field respectively.</p></dd>

  
</dl></div>
    <div id="source">
    <h2>Source</h2>
    <p><a 