Create empty matrix in python

Question

So, is there a way to achieve the same thing in python as the following line in R: matrix( rep(NA, 3*5), ncol = 5 )

To be more specific, do I need to define an array before reference it in python? How is this process different from MATLAB? I tried to create an array full of 0 using np.zeros((5, 3)), but is there a way to create an empty one and simply keep adding numbers into it?

This variable-initialization (or allocation) is something simpy not performed in python. The matrix full of zeros is as close to empty you will get. Also the exact same question exists here: stackoverflow.com/questions/13347559/… — Ma0
– Ma0, Commented Nov 30, 2016 at 17:49

Community · Accepted Answer · 2017-05-23 12:30:29Z

1

An array full of 0 using np.zeros((5, 3)) is the best thing you can do here because, there no such thing as "variable declaration" or "variable initialization" in Python.

See this answer: Python variable declaration

edited May 23, 2017 at 12:30

CommunityBot

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answered Nov 30, 2016 at 18:28

ngub05

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