NumPy center() function
In this tutorial, we will cover center() function of the char module in the Numpy library.
The center() function is used to return a copy of the input array of the required width so that the input array of a string is centered and padded on the left and right with fillchar.
Syntax of numpy.char.center():
The syntax required to use this function is as follows:
numpy.char.center(a, width, fillchar=' ')
The above syntax indicates that center() function takes two parameters.
Parameters:
Let us now take a look at the parameters of this function:
-
a
This parameter indicates an array of strings or a string on which the function will be applied.
-
width
This parameter indicates the length of the resulting string.
-
fillchar
This parameter indicates the padding character to be used as the filler and the default value of this parameter is whitespace.
Returned Values:
This function returns a new string that is padded with characters specified.
Example 1: With a string
The code snippet is as follows where we will use center() function with a simple string:
import numpy as np
a1 = "StudyTonight!"
print("Padding the Inut string through left and right with the fill char ^:");
x = np.char.center(a1, 30, '^')
print(x)
Padding the Inut string through left and right with the fill char ^:
^^^^^^^^StudyTonight!^^^^^^^^^
Example 2: With an array of strings
In the code below, we will be using the center() function for an array of strings. This function acts in the same way for each string element of the array, like it did for a single string in the example above.
import numpy as np
arr= np.array(['StudyTonight', 'Online', 'Portal'])
print("The Original Array :")
print(arr)
output = np.char.center(arr, 30, '^')
print("\nThe Resultant array :")
print(output)
The Original Array :
['StudyTonight' 'Online' 'Portal']
The Resultant array :
['^^^^^^^^^StudyTonight^^^^^^^^^' '^^^^^^^^^^^^Online^^^^^^^^^^^^'
'^^^^^^^^^^^^Portal^^^^^^^^^^^^']
Summary
In this tutorial, we covered the center() function used to add padding to string or string elements present in an array. We covered two different code examples showing the center() function in action for both a single string and for an array of strings.
