本文实例为大家分享了python使用Matplotlib绘制分段函数的具体代码，供大家参考，具体内容如下
环境
Python3
Mac OS
代码
# coding:utf-8
"""
Author: roguesir
Date: 2017/8/30
GitHub: https://roguesir.github.com
Blog: http://blog.csdn.net/roguesir
"""
import numpy as np
import matplotlib.pyplot as plt
def sgn(value):
if value < 4:
return 20
els
