How to write NumPy array to CSV file

You can write NumPy array to CSV file with the following code. If you want to learn Python, I highly recommend reading This Book.

Method 1

import numpy as np

a = np.array([[1,2,3],[4,5,6],[7,8,9]])

np.savetxt("file.csv", a, delimiter=",")

Python
​x
 
import numpy as np​a = np.array([[1,2,3],[4,5,6],[7,8,9]])​np.savetxt("file.csv", a, delimiter=",")

Output:

import pandas as pd
import numpy as np

a = np.array([[1,2,3],[4,5,6],[7,8,9]])

pd.DataFrame(a).to_csv("file2.csv")

Python
 
import pandas as pdimport numpy as np​a = np.array([[1,2,3],[4,5,6],[7,8,9]])​pd.DataFrame(a).to_csv("file2.csv")

Output: