Class03 Answer:

Write NumPy syntax which also sorts by cdate_s.

This is easy.


Create a NumPy Array From Pandas DataFrame of GSPC prices.

import pandas as pd
import numpy  as np

prices_df = pd.read_csv('')
prices_a  = np.array(prices_df)

# Sort the array by date string:
sorted_prices_a = np.sort(prices_a, axis=0)

# I should visualize it:


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