Week 1, assigment 1, conv_forward error

Course Q&A Deep Learning Specialization Convolutional Neural Networks
1

Hello, I get this error when running the cell
np.random.seed(1)
A_prev = np.random.randn(2, 5, 7, 4)
W = np.random.randn(3, 3, 4, 8)
b = np.random.randn(1, 1, 1, 8)
hparameters = {“pad” : 1,
“stride”: 2}

Z, cache_conv = conv_forward(A_prev, W, b, hparameters)

What can be the reason?

Error: Wrong output for variable in position 0.
2 Tests passed
1 Tests failed

AssertionError Traceback (most recent call last)
in
11 print(“cache_conv[0][1][2][3] =\n”, cache_conv[0][1][2][3])
12
—> 13 conv_forward_test(conv_forward)

~/work/release/W1A1/public_tests.py in conv_forward_test(target)
118 ]
119
→ 120 multiple_test(test_cases, target)
121
122

~/work/release/W1A1/test_utils.py in multiple_test(test_cases, target)
151 print(‘\033[91m’, len(test_cases) - success, " Tests failed")
152 raise AssertionError(
→ 153 “Not all tests were passed for {}. Check your equations and avoid using global variables inside the function.”.format(target.name))

AssertionError: Not all tests were passed for conv_forward. Check your equations and avoid using global variables inside the function.

2

There is an error in your conv_forward() function.
That’s all the assert tells you.

3

The most common problem is forgetting to multiply h and w by stride.

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