numpy and pandas data array code example

Example 1: make pandas df from np array

numpy_data = np.array([[1, 2], [3, 4]])
df = pd.DataFrame(data=numpy_data, index=["row1", "row2"], columns=["column1", "column2"])
print(df)
>>>
  column1  column2
row1        1        2
row2        3        4

Example 2: numpy dataframe

pd.DataFrame({"A": [1, 2], "B": [3, 4]}).to_numpy()
array([[1, 3],
       [2, 4]])
       
       
data = np.array([['','Col1','Col2'],
                ['Row1',1,2],
                ['Row2',3,4]])
                
print(pd.DataFrame(data=data[1:,1:],
                  index=data[1:,0],
                  columns=data[0,1:]))