Conditionals in NumPy

Data Wrangling

Difficulty: 2 | Problem written by vivek

Educational Resource: https://cs231n.github.io/python-numpy-tutorial/

Implement a function that will replace all positive values in a given array with the "+" sign and all negative values with the "-" sign. 

Do not use explicit iteration (i.e., a for loop or list comprehension) for this problem!

As a final step, convert the NumPy array into a list.

Sample Input:
<class 'list'>
input_array: [0.6372, -1.5926, 2.2043, -0.7585, 0.0752]

Expected Output:
<class 'list'>
['+', '-', '+', '-', '+']

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Jump to comment-85
rafi • 7¬†months, 2¬†weeks ago


input_array = np.array(input_array)
return list(np.where((input_array<0),'-',np.where((input_array>0),'+',input_array))) 



Input Test Case

Please enter only one test case at a time
numpy has been already imported as np (import numpy as np)