Convert the given list into a numpy array and replace the odd elements with -2

INSTRUCTIONS TO CANDIDATES

ANSWER ALL QUESTIONS

1. Convert the given list into a numpy array and replace the odd elements with -2.

Lst =[[1,2,3],

[4,5,6],

[7,8,9]]

 

2. In the numpy array given below print all the elements ranging from 8 to 15.

arr = [1,2,3,4,5,8,9,10,12,22,32,54,99,6,7]

 

3. Create a 3*3 narray that includes numbers from 1 to 9 and swap columns 1 and 2.

 

4. In the given numpy array replace the NaN values with the average of columns

arr = np.array([[1.3, 2.5, 3.6, np.nan],

[2.6, 3.3, np.nan, 5.5],

[2.1, 3.2, 5.4, 6.5]])

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