docs: def scatter_matrix(df,theme=None,bins=10,color='grey',size=2):
  	"""
  	Displays a matrix with scatter plot for each pair of
  	Series in the DataFrame.
  	The diagonal shows a histogram for each of the Series
  
  	Parameters:
  	-----------
  		df : DataFrame
  			Pandas DataFrame
  		theme : string
  			Theme to be used (if not the default)
  		bins : int
  			Number of bins to use for histogram
  		color : string
  			Color to be used for each scatter plot
  		size : int
  			Size for each marker on the scatter plot
  	"""
  	if not theme:
  		theme = auth.get_config_file()['theme']
  
  	figs=[]
  	for i in df.columns:
  		for j in df.columns:
  			if i==j:
  				fig=df.iplot(kind='histogram',keys=[i],asFigure=True,bins=bins)
  				figs.append(fig)
  			else:
  				figs.append(df.iplot(kind='scatter',mode='markers',x=j,y=i,asFigure=True,size=size,colors=[color]))
  	layout=getLayout(theme)
  	layout['xaxis'].update(showgrid=False)
  	layout['yaxis'].update(showgrid=False)
  	sm=subplots(figs,shape=(len(df.columns),len(df.columns)),shared_xaxes=False,shared_yaxes=False,
  					  horizontal_spacing=.05,vertical_spacing=.07,base_layout=layout)
  	sm['layout'].update(bargap=.02,showlegend=False)
  	return sm