import matplotlib.pyplot as plt

#!/usr/bin/env python
#-*- coding: utf-8 -*-
import math
import random
import numpy as np
import matplotlib.pyplot as plt
import matplotlib.patches as mpathes
from wrTXT import ReadDataTxt

def test_01():
    x = np.linspace(0, 10, 40)
    
    plt.figure(1)  #创建画板1
    plt.subplot(221)  #进入221区域作图
    # plt.plot(x, np.sin(x), 'g', label="sin(x)", linewidth = 2.5 )  # green linewidth 2.5
    plt.plot(x, np.sin(x), color='#2DCCD3', label="sin(x)", linewidth = 2.5, marker='^', linestyle='--')  # green linewidth 2.5
    plt.legend(loc="upper right") # 设置label为位置，显示在右上角
    plt.axhline(y = 0.8, ls='--', c='r', linewidth = 2.5) #绘制平行于x轴y=0.8的水平参考线
    plt.ylim(-1.5, 1.5)

    # 绘制垂直于x轴x<4 and x>6的参考区域，以及y轴y<0
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