Answers for "pandas dataframe to 2d array with column as index"

dataframe from arrays python

import pandas as pd
df=pd.DataFrame({'col1':vect1,'col2':vect2})

dataframe object to numpy array

import pandas as pd

#initialize a dataframe
df = pd.DataFrame(
	[[21, 72, 67],
	[23, 78, 69],
	[32, 74, 56],
	[52, 54, 76]],
	columns=['a', 'b', 'c'])

#convert dataframe to numpy array
arr = df.to_numpy()

print('nNumpy Arrayn----------n', arr)