title: X- axis titles in plotly for python
body: <p>I am very new to plotly. I need to add specific X axis-labels for the box-plot. The X- axis names i need to put is shown in an array <code>x_label</code>. Any suggestions will be appreciated. </p>
  
  <pre><code>import plotly
  plotly.tools.set_credentials_file(username='demo', api_key='u759djdol')
  import matplotlib.pyplot as plt
  import numpy as np
  import plotly.plotly as py
  import plotly.tools as tls
  
  
  #x = np.array([1,2,3,4,5,6,7,8,9])
  
  atn_time_1_1 = np.array([22,31,71,74,17,22,23,51,39])
  atn_time_1_2 = np.array([27,30,20,40,29,22,36,35,38,32])
  atn_time_1_3 = np.array([34,15,14,86,22,17,27,33,26,22,102,14])
  atn_time_1_4 = np.array([26,31,85,23,24,42,74,33,43,45,12,26,38])
  atn_time_1_9 = np.array([65,37,22,47,23,56,59,65,64,50,42,19,40,22,39])
  atn_time_1_16 = np.array([15,36,18,58,27,89,36,24,15,29,21,21,60,36,126,54])
  atn_time_4_12 = np.array([18,14,56,110,32,73,17,23,32,25,44,24])
  atn_time_4_16 =np.array([32,17,36,80,32,28,70,34,36,42,29,58,26,18,20])
  atn_time_4_36 = np.array([12,23,86,30,45,63,30,43,64,39,46,49,19,34])
  
  x_label = ['1 vs 1','1 vs 2','1 vs 3','1 vs 4''1 vs 9','1 vs 16'
           ,'4 vs 12','4 vs 16','4 vs 36']
  
  data = [atn_time_1_1,atn_time_1_2,atn_time_1_3,atn_time_1_4,
      atn_time_1_9,atn_time_1_16,atn_time_4_12,atn_time_4_16,
      atn_time_4_36]
  
  mpl_fig = plt.figure()
  ax = mpl_fig.add_subplot(111)
  
  ax.boxplot(data)
  ax.set_xlabel('run_tasks')
  ax.set_ylabel('Colony emigration time (min)')
  
  plotly_fig = tls.mpl_to_plotly( mpl_fig )
  plot_url = py.plot(plotly_fig, 'simple_boxplot')
  </code></pre>