[Python Study Notes]水平柱状图绘制

'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
>>文件: 水平直方图.py
>>作者: liu yang
>>邮箱: liuyang0001@outlook.com
>>博客: www.cnblogs.com/liu66blog'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''#!/usr/bin/env python
#  -*- coding: utf-8 -*-import sys, os
import matplotlib
import matplotlib.pyplot as plt
# 定义要使用的字体,防止出现中文乱码
font=matplotlib.font_manager.FontProperties(fname=r"C:\Windows\Fonts\Deng.ttf")# Horizontal histogram 水平直方图
def horizontal_histogram():
    # 先生成一个画布
    fig = plt.figure()
    # 生成数据
    x1 = [x for x in range(1, 9)]
    y1 = [n * 2 for n in range(1, 9)]
    x2 = [x for x in range(1, 9)]
    y2 = [x ** 2 for x in x2]
    # 画水平直方图
    l2=plt.barh(x2,y2,color='b')
    l1=plt.barh(x1,y1,color='g')
    # 设置
    plt.title("水平直方图",fontproperties=font)
    # 设置x，y轴标签
    plt.xlabel('数量',fontproperties=font)
    plt.ylabel('产品',fontproperties=font)
    # 设置刻度
    plt.xticks([x for x in range(0,80,4)])
    plt.yticks([y for y in range(0,9,1)])
    # 设置注解狂图示
    plt.legend(handles = [l1, l2,], labels = ['去年', '今年'], loc = 'best',prop=font)
    for x1,x2, y1, y2 in zip(x1,x2, y1, y2):
        # 添加文本时添加偏移量使其显示更加美观
        plt.text(y1+1.5 , x1-0.25, '%.0f' % y1, ha='center', va='bottom')
        plt.text(y2+1.5 , x2-0.25, '%.0f' % y2, ha='center', va='bottom')
    # 显示
    plt.show()
if __name__ == '__main__':
    histogram = horizontal_histogram()