ions1</span>, <span class='kw'>y</span> <span class='kw'>=</span> <span class='no'>regions2</span>, <span class='kw'>x_name</span> <span class='kw'>=</span> <span class='no'>z</span>, <span class='kw'>y_name</span> <span class='kw'>=</span> <span class='no'>z</span>)
<span class='no'>mc</span></div><div class='output co'>#&gt; The MapCurves results:
#&gt; 
#&gt;  The goodness of fit: 0.61 
#&gt;  Reference map: x 
#&gt; 
#&gt;  The spatial objects can be retrieved with:
#&gt;  $map1 - the first map
#&gt;  $