Matlibplot图平滑低于零

Question

我想用一个简单的线条图平滑一个图形，但是当平滑时，曲线被拉低到零以下，但我希望它是全部正面的。这将如何工作？

v只是具有正值的任何列表，我不想只是将值设为正值（abs(bincenters)）。

def main(v): 
    window = Tk() 
    x=np.array ([1,2,3,4,5,6,7,8,9,10]) 

    p = np.array(v) 

    fig = Figure(figsize=(15,7)) 
    a = fig.add_subplot(111) 

    med = np.median(p) 
    print(med) 

    y,binEdges=np.histogram(p,bins=200) 
    bincenters = 0.5*(binEdges[1:]+binEdges[:-1]) 

    maxi = max(y) 

    x_smooth = np.linspace(bincenters.min(), bincenters.max(), len(y)*10) 
    y_smooth = spline(bincenters, y, x_smooth) 

    a.grid(True) 
    a.annotate('Median: %s' %med, xy=(med, 0), xytext=(med + max(v)/15, maxi*0.7), 
      arrowprops=dict(arrowstyle="->", 
          connectionstyle="arc3"),) 

    a.plot(x_smooth,y_smooth,'-',color="#3F5D7D") 

    a.set_title ("Histogram for %s"%product, fontsize=16) 

    canvas = FigureCanvasTkAgg(fig, master=window1) 
    canvas.get_tk_widget().pack() 
    b2 = Button(window1, text='Close', bg="#FAAC58", command= lambda : close(window)) 
    b2.pack(side=LEFT, padx=5, pady=5) 
    canvas.draw() 
    window.mainloop() 

Answer 1

您可以在地板零的y值：

y_smooth = spline(bincenters, y, x_smooth) 
y_smooth = np.where(y_smooth > 0, y_smooth, 0)