How to convert 1-D arrays as columns into a 2-D array in Python? Last Updated : 13 Jan, 2021 Comments Improve Suggest changes Like Article Like Report Let's see a program to convert 1-D arrays as columns into a 2-D array using NumPy library in Python. So, for solving this we are using numpy.column_stack() function of NumPy. This function takes a sequence of 1-D arrays and stack them as columns to make a single 2-D array. Syntax : numpy.column_stack(tuple) Parameters : tup : [sequence of ndarrays] Tuple containing arrays to be stacked. The arrays must have the same first dimension. Return : [stacked 2-D array] The stacked 2-D array of the input arrays. Now, let's see an example: Example 1: Python3 # import library import numpy as np # create a 1d-array a = np.array(("Geeks", "for", "geeks")) # create a 1d-array b = np.array(("my", "name", "sachin")) # convert 1d-arrays into # columns of 2d-array c = np.column_stack((a, b)) print(c) Output: [['Geeks' 'my'] ['for' 'name'] ['geeks' 'sachin']] Example 2: Python3 # import library import numpy as np # create 1d-array a = np.array((1,2,3,4)) # create 1d-array b = np.array((5,6,7,8)) # convert 1d-arrays into # columns of 2d-array c = np.column_stack((a, b)) print(c) Output: [[1 5] [2 6] [3 7] [4 8]] Comment More infoAdvertise with us Next Article How to convert 1-D arrays as columns into a 2-D array in Python? Y ysachin2314 Follow Improve Article Tags : Python Python-numpy Python numpy-arrayManipulation Practice Tags : python Similar Reads Convert 2D float array to 2D int array in NumPy Converting a 2D float array to a 2D integer array in NumPy is a straightforward process using the astype() method. This conversion can be useful in various data analysis and scientific computing tasks where integer data types are required or where memory efficiency is essential. In this article, we 8 min read How to convert 1D array of tuples to 2D Numpy array? In this article, we will discuss how to convert a 1D array of tuples into a numpy array. Example: Input: [(1,2,3),('Hi','Hello','Hey')] Output: [['1' '2' '3'] ['Hi' 'Hello' 'Hey']] #NDArray Method 1: Using Map The map is a function used to execute a function for each item in an Iterable i.e array. 2 min read Convert a 1D array to a 2D Numpy array Here we will learn how to convert 1D NumPy to 2D NumPy Using two methods. 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