C1_W3_Exercise 4 - Prediction

Course Q&A Machine Learning Specialization Supervised ML: Regression and Classification
1

Hi,
My function for Predict (week 3, exercise 4) produces a result that does not pass the test. Result:

*Output of predict: shape (4,), value [0. 0. 0. 1.] *

AssertionError: Wrong output: Expected : [1.0, 1.0, 1.0, 0.0, 1.0, 0.0, 0.0, 1.0] got: [0. 0. 0. 0. 0. 0. 0. 1.]

if I change the indentation of my P ifelse statement to be in line with the nested loop above I get:

Output of predict: shape (4,), value [0. 1. 1. 1.]

AssertionError: Wrong output: Expected : [1.0, 1.0, 1.0, 0.0, 1.0, 0.0, 0.0, 1.0] got: [1. 1. 1. 1. 1. 1. 1. 1.]

I’ve tried:

-rewatching the week three course videos but cannot find one on prediction so I’m a bit lost troubleshooting.
-experimented with various indentations of my ifelse code, the results change but still dont pass.
-Used all of the hints, and tried replacing my ifelse statement with the p[i] code provided in the hint, but this also doesn’t pass the test.

I know we’re not to display solution code here (although mine is wrong so perhaps there’s not harm?) but if someone could offer to help perhaps there’s a way i can share my code with you?

Many thanks for any support in advance,
James

2

Python is extremely picky about indentation - that’s how it defines blocks of code.

Review how you have your code indented. There should not be any guesswork.

4

  1. Please don’t post your code on the forum. That’s not allowed by the course honor code.
    If a mentor needs to see your code, we’ll ask you to send it via a private message.

  2. You have an indentation problem. Python defines code blocks using indentation. Since the function definition starts in column 1, everything (that isn’t a comment) below that must be indented.

So the indentation problem starts with the first line of code below the doctext block:
# number of training examples

5

Thanks Tom, I’ve deleted it, but getting to a point of desperation having been stuck here for a few weeks and have tried so many indentation combinations at this point i was convinced it must be the code. I’ll try again.

6

If you can’t fix it by just highlighting all your code and pressing “<tab>”, then download your notebook ipynb file and send it to me via a PM.

To get a PM, click on my name and use the “Message” button.