# -*- coding:utf-8 -*-

import matplotlib.pyplot as plt
plt.style.use('ggplot')
from matplotlib.font_manager import *

import numpy as np
import pandas as pd

#定义自定义字体
myfont = FontProperties(fname='/temp/msyh.ttf')
#解决负号'-'显示为方块的问题
plt.rcParams['axes.unicode_minus']=False

df = pd.read_csv('/temp/iris.data',names=['花萼长度', '花萼宽度', '花瓣长度', '花瓣宽度', '类别'])

fig,ax = plt.subplots(figsize=(6,6))
ax.plot(df['花瓣长度'], color='green')
ax.set_xlabel(u'样本号',fontproperties=myfont)
ax.set_ylabel(u'花萼宽度',fontproperties=myfont)
ax.set_title(u'花瓣长度线图',fontproperties=myfont)

plt.tight_layout()
plt.show()