[Python Study Notes]水平柱狀圖繪制

 

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>>文件: 水平直方圖.py
>>作者: liu yang
>>郵箱: [e-mail]
>>博客: www.cnblogs.com/liu66blog

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#!/usr/bin/env python
#  -*- coding: utf-8 -*-

import sys, os
import matplotlib
import matplotlib.pyplot as plt
# 定義要使用的字體,防止出現中文亂碼
font=matplotlib.font_manager.FontProperties(fname=r"C:\Windows\Fonts\Deng.ttf")

# Horizontal histogram 水平直方圖
def horizontal_histogram():
    # 先生成一個畫布
    fig = plt.figure()
    # 生成數據
    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]
    # 畫水平直方圖
    l2=plt.barh(x2,y2,color='b')
    l1=plt.barh(x1,y1,color='g')
    # 設置
    plt.title("水平直方圖",fontproperties=font)
    # 設置x，y軸標簽
    plt.xlabel('數量',fontproperties=font)
    plt.ylabel('產品',fontproperties=font)
    # 設置刻度
    plt.xticks([x for x in range(0,80,4)])
    plt.yticks([y for y in range(0,9,1)])
    # 設置注解狂圖示
    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):
        # 添加文本時添加偏移量使其顯示更加美觀
        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')
    # 顯示
    plt.show()
if __name__ == '__main__':
    histogram = horizontal_histogram()