new_contents: #!/usr/bin/python
  
  import sys
  import matplotlib.pyplot as plt
  import matplotlib.cm as cm
  import pandas
  from matplotlib.ticker import MultipleLocator, FormatStrFormatter
  
  plt.clf()
  fig=plt.figure()
  ax = fig.add_subplot(111)
  mat=pandas.read_csv(sys.argv[1],header=0,index_col=0)
  ax.matshow(mat,cmap=cm.gray, interpolation='nearest', vmin=0, vmax=1)
  ax.xaxis.set_major_locator(MultipleLocator(1))
  ax.set_xticklabels([""]+mat.columns.tolist(), rotation=90)
  ax.yaxis.set_major_locator(MultipleLocator(1))
  ax.yaxis.set_major_formatter(FormatStrFormatter('%s'))
  ax.set_yticklabels([""]+mat.index.tolist())
  ax.tick_params(axis='both', which='both', labelsize=4, direction='out',
                         labelleft='on', labelright='off', labelbottom='off',
                         labeltop='on', left='on', right='off', bottom='off',
                         top='on')
  plt.savefig(sys.argv[2], bbox_inches='tight')
  
  
subject: add python script to plot an absence presence matrix from a csv file