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#example a=0, b=10    
N=10000    
y = [random() for i in range(N)]    
A = []    
a=0    
b=10    
f = a*sin(x)+b*cos(2*x)    
for i in y:    
    f31 = f + normalvariate(0,1)    
    A.append(f31)    
v1 = finance.TimeSeries(A)    
p = v1.plot_histogram(bins=100,color='black', normalize=True)    
p.set_aspect_ratio('automatic')    
p

a it should be a * sin and b * cos
not displayed

What is wrong??

Thanks