Thank you for your reply, Tamas. But when I use plot(dd), I got a type error:


BTW, i'm using python 3.5.1


--------------------------------------------------------------------------- 
TypeError                                 Traceback (most recent call last) 
<ipython-input-6-40f2a8de40be> in <module>()       1 dd = 
g.degree_distribution() ----> 2 plot(dd).show() 
/usr/local/lib/python3.5/site-packages/matplotlib/pyplot.py in plot(*args, 
**kwargs)    3152         ax.hold(hold)    3153     try: -> 3154         ret = 
ax.plot(*args, **kwargs)    3155     finally:    3156         ax.hold(washold) 
/usr/local/lib/python3.5/site-packages/matplotlib/__init__.py in inner(ax, 
*args, **kwargs)    1809                     warnings.warn(msg % (label_namer, 
func.__name__),    1810                                   RuntimeWarning, 
stacklevel=2) -> 1811             return func(ax, *args, **kwargs)    1812      
   pre_doc = inner.__doc__    1813         if pre_doc is None: 
/usr/local/lib/python3.5/site-packages/matplotlib/axes/_axes.py in plot(self, 
*args, **kwargs)    1426     1427         for line in self._get_lines(*args, 
**kwargs): -> 1428             self.add_line(line)    1429             
lines.append(line)    1430  
/usr/local/lib/python3.5/site-packages/matplotlib/axes/_base.py in 
add_line(self, line)    1697             line.set_clip_path(self.patch)    1698 
 -> 1699         self._update_line_limits(line)    1700         if not 
line.get_label():    1701             line.set_label('_line%d' % 
len(self.lines)) 
/usr/local/lib/python3.5/site-packages/matplotlib/axes/_base.py in 
_update_line_limits(self, line)    1708         Figures out the data limit of 
the given line, updating self.dataLim.    1709         """ -> 1710         path 
= line.get_path()    1711         if path.vertices.size == 0:    1712           
  return /usr/local/lib/python3.5/site-packages/matplotlib/lines.py in 
get_path(self)     924         """     925         if self._invalidy or 
self._invalidx: --> 926             self.recache()     927         return 
self._path     928  /usr/local/lib/python3.5/site-packages/matplotlib/lines.py 
in recache(self, always)     618                 y = ma.asarray(yconv, 
np.float_).filled(np.nan)     619             else: --> 620                 y = 
np.asarray(yconv, np.float_)     621             y = y.ravel()     622         
else: /usr/local/lib/python3.5/site-packages/numpy/core/numeric.py in 
asarray(a, dtype, order)     472      473     """ --> 474     return array(a, 
dtype, copy=False, order=order)     475      476 def asanyarray(a, dtype=None, 
order=None): TypeError: float() argument must be a string or a number, not 
'Histogram'


------------------ Original ------------------
From:  "Tamas Nepusz";<nta...@rmki.kfki.hu>;
Date:  Sun, Sep 18, 2016 03:45 AM
To:  "Help for igraph users"<igraph-help@nongnu.org>; 

Subject:  Re: [igraph] how to plot degree distribution, please?



> dd = g.degree_distribution()
> dd.__plot__("dd",(800,800),None)

__plot__ is an internal function; you are not supposed to call it
directly. Call the plot() function instead:

>>> dd = g.degree_distribution()
>>> plot(dd)

or, if the plot is not shown automatically, then:

>>> plot(dd).show()

T.

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