Question

我有一个段落列表，我想在他们的组合上运行zipf发行版。

我的代码如下：

from itertools import *
from pylab import *
from collections import Counter
import matplotlib.pyplot as plt


paragraphs = " ".join(targeted_paragraphs)
for paragraph in paragraphs:
   frequency = Counter(paragraph.split())
counts = array(frequency.values())
tokens = frequency.keys()

ranks = arange(1, len(counts)+1)
indices = argsort(-counts)
frequencies = counts[indices]
loglog(ranks, frequencies, marker=".")
title("Zipf plot for Combined Article Paragraphs")
xlabel("Frequency Rank of Token")
ylabel("Absolute Frequency of Token")
grid(True)
for n in list(logspace(-0.5, log10(len(counts)-1), 20).astype(int)):
    dummy = text(ranks[n], frequencies[n], " " + tokens[indices[n]],
    verticalalignment="bottom",
    horizontalalignment="left")

起初我出于某种原因遇到了以下错误，不知道原因：

IndexError: index 1 is out of bounds for axis 0 with size 1

用途我试图绘制一条合适的线条＆＃34;在此图中，将其值赋给变量。但是我不知道如何添加它。对于这两个问题，任何帮助都会受到高度赞赏。

Answer 1

我不知道targeted_paragraphs的样子，但我使用了错误：

targeted_paragraphs = ['a', 'b', 'c']

基于此，看起来问题在于如何设置for循环。您使用从ranks的长度生成的列表为frequencies和counts编制索引，但这会给您一个错误的错误，因为（据我所知））ranks，frequencies和counts都应具有相同的长度。更改循环索引以使用len(counts)-1，如下所示：

for n in list(logspace(-0.5, log10(len(counts)-1), 20).astype(int)):
    dummy = text(ranks[n], frequencies[n], " " + tokens[indices[n]],
    verticalalignment="bottom",
    horizontalalignment="left")

使用matplotlib构造Zipf分布，尝试绘制拟合线

1 个答案: