Dump a NumPy array into a csv file

Question

Dump a NumPy array into a csv file

Is there an approach to dump a NumPy array into a CSV file? I have a 2D NumPy array and need to dump it in a human-readable format.

csv array python

4 years ago by Bharatv4tg1

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**aashaykumar** · Answer 1 · 2021-05-13T11:37:10

You can use pandas. It does take some extra memory so it's not always possible, but it's very fast and easy to use.



import pandas as pd 

pd.DataFrame(np_array).to_csv("path/to/file.csv")

if you don't want a header or index, use to_csv("/path/to/file.csv", header=None, index=None)

**kshitijrana14** · Answer 2 · 2021-05-15T14:00:11

numpy.savetxt saves an array to a text file.

import numpy

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

numpy.savetxt("foo.csv", a, delimiter=",")

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Dump a NumPy array into a csv file

2 Answers

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