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Given the following text description, write Python code to implement the functionality described below step by step
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Description:
 Covariant Lyapunov Vectors
ndarray-odeint has calculator of Covariant Lyapunov Vector (CLV).
The algorithm of CLV has introduced in Ginelli et al. PRL(2007) to analyze collective motions.
Step1:  A sample script for calculate CLV of Lorenz 63 model is placed at examples/clv.rs
Step2:  Tangency of CLVs
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Python Code:
%matplotlib inline
import pandas as pd
import matplotlib.pyplot as plt
import numpy as np
Explanation: Covariant Lyapunov Vectors
ndarray-odeint has calculator of Covariant Lyapunov Vector (CLV).
The algorithm of CLV has introduced in Ginelli et al. PRL(2007) to analyze collective motions.
End of explanation
! cargo run --release --example clv > clv.csv
Explanation: A sample script for calculate CLV of Lorenz 63 model is placed at examples/clv.rs
End of explanation
df = np.arccos(pd.read_csv("clv.csv"))
for col in df.columns:
    plt.figure()
    plt.title(col)
    df[col].hist(bins=100)
    plt.xlim(0, np.pi)
    plt.yscale("log")
Explanation: Tangency of CLVs
End of explanation
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