Numpy - String Functions & Operations

numpy string operations | rjust() function

Last Updated : 05 Feb, 2019

numpy.core.defchararray.rjust(arr, width, fillchar=' ') is another function for doing string operations in numpy. It returns an array with the elements of arr right-justified in a string of length width.It fills remaining space of each array element using fillchr parameter.If fillchr is not passed then it fills remaining spaces with blank space.

Parameters: arr : array_like of str or unicode.Input array. width : The final width of the each string . fillchar : The character to fill in remaining space. Returns : [ndarray] Output right justified array of str or unicode, depending on input type.

Code #1 :

Python3

# Python program explaining
# numpy.char.rjust() method 

# importing numpy 
import numpy as geek

# input array  
in_arr = geek.array(['Numpy', 'Python', 'Pandas'])
print ("Input array : ", in_arr) 

# setting the width of each string to 8
width = 8

# output array when fillchar is not passed
out_arr = geek.char.rjust(in_arr, width)
print ("Output right justified array: ", out_arr)

Output:

Input array :  ['Numpy' 'Python' 'Pandas']
Output right justified array:  ['   Numpy' '  Python' '  Pandas']

Code #2 :

Python3

# Python program explaining
# numpy.char.rjust() method 

# importing numpy 
import numpy as geek

# input array  
in_arr = geek.array(['Numpy', 'Python', 'Pandas'])
print ("Input array : ", in_arr) 

# setting the width of each string to 8
width = 8

# output array 
out_arr = geek.char.rjust(in_arr, width, fillchar ='*')
print ("Output right justified array: ", out_arr)

Output:

Input array :  ['Numpy' 'Python' 'Pandas']
Output right justified array:  ['***Numpy' '**Python' '**Pandas']

Code #3 :

Python3

# Python program explaining
# numpy.char.rjust() method 

# importing numpy 
import numpy as geek

# input array  
in_arr = geek.array(['1', '11', '111'])
print ("Input array : ", in_arr)

# setting the width of each string to 5
width = 5

# output array
out_arr = geek.char.rjust(in_arr, width, fillchar ='-')
print ("Output right justified array: ", out_arr)

Output:

Input array :  ['1' '11' '111']
Output right justified array:  ['----1' '---11' '--111']

Numpy - String Functions & Operations

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