How Do I Save a 2D NumPy Array as a Human-Readable CSV File?

Saving a 2D NumPy Array to a Human-Readable CSV File

To output a 2D NumPy array into a human-readable CSV (Comma-Separated Values) file, utilize the numpy.savetxt function. This function exports an array to a text file in a format that can be easily understood by humans.

Implementation:

Python code to illustrate this process:

import numpy
a = numpy.asarray([ [1,2,3], [4,5,6], [7,8,9] ])
numpy.savetxt("foo.csv", a, delimiter=",")

In this example, the 2D array a contains a matrix of numbers. The numpy.savetxt function is invoked, specifying the filename "foo.csv" as the destination. The delimiter argument sets a comma as the separator between the values.

Output:

The saved CSV file, "foo.csv", will have the following contents:

1,2,3
4,5,6
7,8,9

This represents the values of the NumPy array in a human-readable format, making it easy to analyze, share, and further process.

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