Convert pandas dataframe to NumPy array

Question

I am interested in knowing how to convert a pandas dataframe into a NumPy array.

dataframe:

import numpy as np
import pandas as pd

index = [1, 2, 3,         


        

Answer 1

Try this:

np.array(df) 

array([['ID', nan, nan, nan],
   ['1', nan, 0.2, nan],
   ['2', nan, nan, 0.5],
   ['3', nan, 0.2, 0.5],
   ['4', 0.1, 0.2, nan],
   ['5', 0.1, 0.2, 0.5],
   ['6', 0.1, nan, 0.5],
   ['7', 0.1, nan, nan]], dtype=object)

Some more information at: [https://docs.scipy.org/doc/numpy/reference/generated/numpy.array.html] Valid for numpy 1.16.5 and pandas 0.25.2.