title: A conclusion about impixel Func in matlab
body: <p>I am new to matlap</p>
  <p>And this is a simple impixel statement :<br>
  <code>I = imread('user.png'); impixel(I)</code></p>
  <hr>
  the error :
  Error using getpts (line 174)
  Interruption during mouse point selection.
  <p>Error in impixel&gt;parse_inputs (line 199)
  [xi,yi] = getpts(ancestor(h,'axes'));<br>
  Error in impixel (line 76)
  [a,cm,xi,yi,x,y] = parse_inputs(varargin{:});</p>
  <p>Error in first (line 2)
  impixel(I);<br></p>
  <hr>
  The name of file is "first"
  What is wrong here ,i have been searching a whole day , any help please