title: pyAudioAnalysis, Tuple index out of range
body: <p>So I am trying to make a rudimentary emotion classifier using the <a href="https://github.com/tyiannak/pyAudioAnalysis" rel="nofollow">pyAudioAnalysis library</a>, and I have collected a small datasample to test if it works. my code is as following:</p>
  
  <pre><code>from pyAudioAnalysis import audioAnalysis as aA   
  
  aA.trainClassifierWrapper('svm', False,
                        ["C:\Users\gover_000\Desktop\Angry",
                        "C:\Users\gover_000\Desktop\Happy",
                        "C:\Users\gover_000\Desktop\Sad",
                        "C:\Users\gover_000\Desktop\Scared",
                        "C:\Users\gover_000\Desktop\Neutral"],
                        "testSVM")
  </code></pre>
  
  <p>If I execute this, it gives this error: </p>
  
  <pre><code>Traceback (most recent call last) &lt;ipython-input-7-2e5393432e89&gt; in &lt;module&gt;()
    5                       "C:\Users\gover_000\Desktop\Scared",
    6                       "C:\Users\gover_000\Desktop\Neutral"],
  ----&gt; 7                       "testSVM")
  
  C:\Users\gover_000\Documents\GitHub\Emotion-Recognition-Prototype\pyAudioAnalysis\audioAnalysis.pyc in trainClassifierWrapper(method, beatFeatures, directories, modelName)
       88         raise Exception("At least 2 directories are needed")
       89     aT.featureAndTrain(directories, 1, 1, aT.shortTermWindow, aT.shortTermStep,
  ---&gt; 90                        method.lower(), modelName, computeBEAT=beatFeatures)
       91 
       92 
  
  C:\Users\gover_000\Documents\GitHub\Emotion-Recognition-Prototype\pyAudioAnalysis\audioTrainTest.pyc in featureAndTrain(listOfDirs, mtWin, mtStep, stWin, stStep, classifierType, modelName, computeBEAT, perTrain)
      275     featureNames = ["features" + str(d + 1) for d in range(numOfFeatures)]
      276 
  --&gt; 277     writeTrainDataToARFF(modelName, features, classNames, featureNames)
      278 
      279     for i, f in enumerate(features):
  
  C:\Users\gover_000\Documents\GitHub\Emotion-Recognition-Prototype\pyAudioAnalysis\audioTrainTest.pyc in writeTrainDataToARFF(modelName, features, classNames, featureNames)
     1097     for c, fe in enumerate(features):
     1098         for i in range(fe.shape[0]):
  -&gt; 1099             for j in range(fe.shape[1]):
     1100                 f.write("{0:f},".format(fe[i, j]))
     1101             f.write(classNames[c]+"\n")
  
  IndexError: tuple index out of range
  </code></pre>
  
  <p>I know  <code>shape[1]</code> is supposed to return the columns of an array dimension. 
  but why does it return an error here  </p>