In [1]:

    

import matplotlib.pyplot as plt
import pandas as pd
import numpy as np
%matplotlib inline


    

In [2]:

    

index = pd.date_range(start='1990-11-01 00:00', end='1991-2-1 00:00')


    

In [3]:

    

df = pd.DataFrame(index=index)


    

In [4]:

    

df['u'] = np.sin(0.1*index.to_julian_date()).values**2 - 0.5
df['v'] = np.cos(0.1*index.to_julian_date()).values


    

In [5]:

    

df.plot(figsize=(10,2));


    

In [5]: