title: matplotlib.pyplot.errorbar is throwing an error it shouldn't?
body: <p>I'm trying to make an errorbar plot with my data. X is a 9 element ndarray. Y and Yerr are 9x5 ndarrays. When I call:</p>
  
  <pre><code>matplotlib.pyplot.errorbar(X, Y, Yerr)
  </code></pre>
  
  <p>I get a ValueError: "yerr must be a scalar, the same dimensions as y, or 2xN."</p>
  
  <p>But <code>Y.shape == Yerr.shape</code> is True.</p>
  
  <p>I'm running on 64 bit Windows 7 with Spyder 2.3.8 and Python 3.5.1. Matplotlib is up to date. I've installed Visual C++ Redistributable for Visual Studio 2015.</p>
  
  <p>Any ideas?</p>
  
  <p>Edit: Some data.</p>
  
  <pre><code>X=numpy.array([1,2,3])
  Y=numpy.array([[1,5,2],[3,6,4],[9,3,7]])
  Yerr=numpy.ones_like(Y)
  </code></pre>