C4W3: .gather() does not seem to work as intended

Course Q&A Deep Learning Specialization Convolutional Neural Networks
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1

in the “yolo_non_max_suppression” function, i follow the instructions given which are as present in the comments

        # Append the resulting boxes into the partial result
        # Use tf.gather() with 'selected_indices' and `nms_indices_label`

and the code i wrote
{mentor edit: removed exact description of code}

but this gives me this error:
InvalidArgumentError: indices[0] = 1 is not in [0, 1) [Op:GatherV2]

i spent lots of time on it and even went through the docs of the function, but cant seem to figure it out, can anyone help me out with this

2

You have the order of the function parameters backward.

3

I did change the order(selected_indices first and then nms_indices_label as does make sense, i get that .gather() picks the elements from the param which have the same indices as present in the second param) but then i get this

InvalidArgumentError: indices[1] = 1 is not in [0, 1) [Op:GatherV2]

and the error points to this line itself, so the rest of the code is fine

4

Perhaps your code that creates the nms_indices_label is incorrect.

Note: Describing your code in exact detail is just the same as posing the code itself. Neither is allowed.

Please only include screen capture images that show the entire error message.

5

yup got it now, it was indeed in the nms_indices_label

6

That’s good news, thanks for the update.

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