code: def _add_ticks(xticks=True,yticks=True):
      
      ax=pyplot.gca()
      if xticks:
          xstep= ax.xaxis.get_majorticklocs()
          xstep= xstep[1]-xstep[0]
          ax.xaxis.set_minor_locator(ticker.MultipleLocator(xstep/5.))
      if yticks:
          ystep= ax.yaxis.get_majorticklocs()
          ystep= ystep[1]-ystep[0]
          ax.yaxis.set_minor_locator(ticker.MultipleLocator(ystep/5.))
docs: NAME:
  
         _add_ticks
  
      PURPOSE:
  
         add minor axis ticks to a plot
  
      INPUT:
  
         (none; works on the current axes)
  
      OUTPUT:
  
         (none; works on the current axes)
  
      HISTORY:
  
         2009-12-23 - Written - Bovy (NYU)