Question

Using the myarray4 created in the above questions, write commands for the following:

1. Find the sum of all elements.
2. Find the sum of all elements row wise.
3. Find the sum of all elements column wise
4. Find the max of all elements.
5. Find the min of all elements in each row.
6. Find the mean of all elements in each row.
7. Find the standard deviation column wise.

Answer 1

a) print(np.sum(myarray4))

Output:

115.5

b) print(np.sum(myarray4, axis=1))

Output:

[-2.25 0. 2.25 4.5 6.75 9. 11.25 13.5 15.75 18. 20.25 22.5 24.75 27. ]

c) print(np.sum(myarray4, axis=0))

Output:

[54.25 57.75 61.25]

d) print(np.max(myarray4))

Output:

9.25

e) print(np.min(myarray4, axis=1))

Output:

[-1. -0.25 0.5 1.25 2. 2.75 3.5 4.25 5. 5.75 6.5 7.25 8. 8.75]

f) print(np.mean(myarray4, axis=1))

Output:

[-0.75 0. 0.75 1.5 2.25 3. 3.75 4.5 5.25 6. 6.75 7.5 8.25 9. ]

g) print(np.std(myarray4, axis=0))

Output:

[3.02334688 3.02334688 3.02334688]