python - 在Python3中制作简单的图形直方图

Question

我正在尝试根据图形度值制作直方图。但是当我运行我的代码时，出现了这个错误:

x has only one data point. bins or range kwarg must be given.

如果有人能告诉我我做错了什么，我将不胜感激。

代码是:

import numpy as np
import pandas
import networkx as nx
import unicodecsv as csv
import operator
import matplotlib.pyplot as plt
import scipy.stats as st
import community
import plotly.plotly as py

#graph
path="hero-network.csv"

graph = nx.Graph(name="Heroic Social Network")
with open(path, 'rb') as data:
    reader = csv.reader(data)
    for row in reader:
        graph.add_edge(*row)

#histogram
plt.hist(graph.degree().values() , bins=500)
plt.title("Connectedness of Marvel Characters")
plt.xlabel("Degree")
plt.ylabel("Frequency")
plt.show()

csv 数据文件如下所示(前 10 个节点):

LITTLE, ABNER,"PRINCESS ZANDA"
LITTLE, ABNER,"BLACK PANTHER/T'CHAL"
BLACK PANTHER/T'CHAL,"PRINCESS ZANDA"
LITTLE, ABNER,"PRINCESS ZANDA"
LITTLE, ABNER,"BLACK PANTHER/T'CHAL"
BLACK PANTHER/T'CHAL,"PRINCESS ZANDA"
STEELE, SIMON/WOLFGA,"FORTUNE, DOMINIC"
STEELE, SIMON/WOLFGA,"ERWIN, CLYTEMNESTRA"
STEELE, SIMON/WOLFGA,"IRON MAN/TONY STARK "
STEELE, SIMON/WOLFGA,"IRON MAN IV/JAMES R."

Answer 1

Matplotlib 将可迭代对象解释为单个值。在 python 3 中，dict.values 返回一个可迭代对象。将其转换为列表，它将起作用:

plt.hist(list(graph.degree().values()), bins=500)