import matplotlib as mpl
import matplotlib.pyplot as plt
import pandas as pd 
import numpy as np 

# 解决坐标轴刻度负号乱码
plt.rcParams[‘axes.unicode_minus‘] = False

# 解决中文乱码问题
plt.rcParams[‘font.sans-serif‘] = [‘Simhei‘]

import pandas as pd

series = pd.Series([2.5, 4.1, 2.7, 8.8, 1.0]) 
series.index.name=‘site‘    # series的索引会转化为横坐标，索引的标签会转化为横坐标的标签名

series.plot(kind="line",linestyle=‘-.‘, color=‘k‘, marker=‘o‘);