Numpy MaskedArray.atleast_2d() function | Python Last Updated : 13 Oct, 2019 Comments Improve Suggest changes Like Article Like Report numpy.MaskedArray.atleast_2d() function is used to convert inputs to masked arrays with at least two dimension.Scalar and 1-dimensional arrays are converted to 2-dimensional arrays, whilst higher-dimensional inputs are preserved. Syntax : numpy.ma.atleast_2d(*arys) Parameters: arys:[ array_like] One or more input arrays. Return : [ ndarray] An array, or list of arrays, each with arr.ndim >= 2 Code #1 : Python3 # Python program explaining # numpy.MaskedArray.atleast_2d() method # importing numpy as geek # and numpy.ma module as ma import numpy as geek import numpy.ma as ma # creating input arrays in_arr1 = geek.array([ 3, -1, 5, -3]) print ("1st Input array : ", in_arr1) in_arr2 = geek.array(2) print ("2nd Input array : ", in_arr2) # Now we are creating masked array. # by making entry as invalid. mask_arr1 = ma.masked_array(in_arr1, mask =[ 1, 0, 1, 0]) print ("1st Masked array : ", mask_arr1) mask_arr2 = ma.masked_array(in_arr2, mask = 0) print ("2nd Masked array : ", mask_arr2) # applying MaskedArray.atleast_2d methods # to masked array out_arr = ma.atleast_2d(mask_arr1, mask_arr2) print ("Output masked array : ", out_arr) Output: 1st Input array : [ 3 -1 5 -3] 2nd Input array : 2 1st Masked array : [-- -1 -- -3] 2nd Masked array : 2 Output masked array : [masked_array(data=[[--, -1, --, -3]], mask=[[ True, False, True, False]], fill_value=999999), masked_array(data=[[2]], mask=[[False]], fill_value=999999)] Code #2 : Python3 # Python program explaining # numpy.MaskedArray.atleast_2d() method # importing numpy as geek # and numpy.ma module as ma import numpy as geek import numpy.ma as ma # creating input array in_arr = geek.array([[[ 2e8, 3e-5]], [[ -45.0, 2e5]]]) print ("Input array : ", in_arr) # Now we are creating a masked array. # by making one entry as invalid. mask_arr = ma.masked_array(in_arr, mask =[[[ 1, 0]], [[ 0, 0]]]) print ("3D Masked array : ", mask_arr) # applying MaskedArray.atleast_2d methods # to masked array out_arr = ma.atleast_2d(mask_arr) print ("Output masked array : ", out_arr) Output: Input array : [[[ 2.0e+08 3.0e-05]] [[-4.5e+01 2.0e+05]]] 3D Masked array : [[[-- 3e-05]] [[-45.0 200000.0]]] Output masked array : [[[-- 3e-05]] [[-45.0 200000.0]]] Create Quiz Comment J jana_sayantan Follow 0 Improve J jana_sayantan Follow 0 Improve Article Tags : Python Python-numpy Python numpy-arrayManipulation Explore Python FundamentalsPython Introduction 2 min read Input and Output in Python 4 min read Python Variables 4 min read Python Operators 4 min read Python Keywords 2 min read Python Data Types 8 min read Conditional Statements in Python 3 min read Loops in Python - For, While and Nested Loops 5 min read Python Functions 5 min read Recursion in Python 4 min read Python Lambda Functions 5 min read Python Data StructuresPython String 5 min read Python Lists 4 min read Python Tuples 4 min read Python Dictionary 3 min read Python Sets 6 min read Python Arrays 7 min read List Comprehension in Python 4 min read Advanced PythonPython OOP Concepts 11 min read Python Exception Handling 5 min read File Handling in Python 4 min read Python Database Tutorial 4 min read Python MongoDB Tutorial 3 min read Python MySQL 9 min read Python Packages 10 min read Python Modules 3 min read Python DSA Libraries 15 min read List of Python GUI Library and Packages 3 min read Data Science with PythonNumPy Tutorial - Python Library 3 min read Pandas Tutorial 4 min read Matplotlib Tutorial 5 min read Python Seaborn Tutorial 3 min read StatsModel Library - Tutorial 3 min read Learning Model Building in Scikit-learn 6 min read TensorFlow Tutorial 2 min read PyTorch Tutorial 6 min read Web Development with PythonFlask Tutorial 8 min read Django Tutorial | Learn Django Framework 7 min read Django ORM - Inserting, Updating & Deleting Data 4 min read Templating With Jinja2 in Flask 6 min read Django Templates 5 min read Build a REST API using Flask - Python 3 min read Building a Simple API with Django REST Framework 3 min read Python PracticePython Quiz 1 min read Python Coding Practice 1 min read Python Interview Questions and Answers 15+ min read Like