Assignment1 help

[Fatima_Khalid]

---

UFuncTypeError Traceback (most recent call last)
in
1 # Test your solution
----> 2 w2_unittest.test_augmented_to_ref(augmented_to_ref)

~/work/w2_unittest.py in test_augmented_to_ref(target)
342
343 for test_case in test_cases:
→ 344 result = target(test_case[“input”][“A”], test_case[“input”][“b”])
345
346 try:

in augmented_to_ref(A, b)
38
39 # multiply row 3 of the new matrix A_ref by -1/17
—> 40 A_ref[3] *= (-1/17)
41 ### END CODE HERE ###
42 return A_ref

UFuncTypeError: Cannot cast ufunc ‘multiply’ output from dtype(‘float64’) to dtype(‘int64’) with casting rule ‘same_kind’

[Fatima_Khalid]

i am getting this error … i dont understand whats the issue

[TMosh]

(edited)

Try using 1. and 17.

[Fatima_Khalid]

same error

[TMosh]

The hints for the assignment say this:

Is there are reason you are not using the MultiplyRow() function?

I do not think the modify-in-place operator ‘*=’ works on matrices.

[Sunita_Sebastian]

Can we get a new assignment folder - I have deleted some of the original code in there

[TMosh]

Go to the File menu, rename your ipynb notebook file, then go to the Help button in the upper right corner, and get the latest version.

[Sunita_Sebastian]

That didn’t work - I have my old code still there and the assignment hasn’t restarted

[TMosh]

What do you mean by “assignment hasn’t restarted”?

A screen capture image would be helpful.

[Sunita_Sebastian]

All good - when I opened it up again, it refreshed

[Sunita_Sebastian]

One final question - do you use the matrix from Exercise 1 in Exercise 3?

[TMosh]

@Sunita_Sebastian

do you use the matrix from Exercise 1 in Exercise 3

No.

The code you write in Exercise 3 should use only the parameters that are passed to each function.
That matrix is referred to as “M”, and the first thing each function does is create a copy called “M_new”.

Your code should modify the matrix M_new.

To test your code, Exercise 3 uses its own matrix “A_test”.

[Sunita_Sebastian]

Thanks for that - I’ve got the code working but the testing code is throwing up this error:

[TMosh]

The w2_unittest function is imported when you run the first cell in the notebook.

You must run all the cells every time you open the notebook.

[Sunita_Sebastian]

Thank you it fixed that error

[Sunita_Sebastian]

No matter how many times I correct the code I still get the wrong answer for Exercise 3 onwards. Is there anyway you can help? (Been at it for 2 weeks now)

[TMosh]

Check your private messages for instructions.