DLS course 4 CNN week 1 coding exercise 1 all test passed but only 75/100

Course Q&A Deep Learning Specialization Convolutional Neural Networks
1

Hi,

I have a problem with the grading for my first coding task. All the tests are passed. but after I submitted, I only get “75/100 passed: Yes”. The grader program doesn’t say which part did not pass.

Is it because I did not do the optional part of work?

2

No it is because you have not passed some of our hidden tests. Send me your notebook as pdf and notebook format in a private message.

3

Conv_forward is wrong.

Your indexing is skipping a lot of values when computing the output volume.

You can check you solution against

Z's mean =
 0.5511276474566768
Z[0,2,1] =
 [-2.17796037  8.07171329 -0.5772704   3.36286738  4.48113645 -2.89198428
 10.99288867  3.03171932]
cache_conv[0][1][2][3] =
 [-1.1191154   1.9560789  -0.3264995  -1.34267579]
4

Hi Jonas,

Thanks for pointing out the problem! I just fixed it and now it is 100/100.

Thanks!

Wenlong

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