24 lines
1.0 KiB
Python
24 lines
1.0 KiB
Python
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#Program: curve_plot.py (Report bugs/comments to chikh@yuntech.edu.tw)
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#Function: 繪製f(x)=x*log(1+x**2)*exp(-x**2)之函數圖形
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#Note: 繪圖指令參見https://matplotlib.org/tutorials/introductory/pyplot.html
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import math
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import matplotlib.pyplot as plt
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# from matplotlib.font_manager import FontProperties
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#-------------------------------------------------------------------#
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# 創建(x,f(x))對應若干位置點存於串列，融合http://bit.ly/2Inq6d9介紹的寫法
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N = 10000 #區間內分為10000點
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xIntvLen = 6 #interval length: 區間[-3,3]寬度
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x = [-3+xIntvLen*(p/N) for p in range(N+1)] #趕緊筆記起來
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fx = []
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for i in range(N+1): #計算每一x所對應的f(x)值，儲存於fx串列
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fx.append(x[i]*math.log(1+x[i]*x[i])*math.exp(-x[i]*x[i]))
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#-------------------------------------------------------------------#
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plt.plot(x,fx)
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plt.xlabel('x'); plt.ylabel('y')
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# chineseFont = FontProperties(fname = 'C:\\Windows\\Fonts\\kaiu.ttf')
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# plt.xlabel(u"x軸",fontproperties = chineseFont) #參考http://bit.ly/2p46ggw
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plt.show()
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