C1w4 : error on model training

Course Q&A TensorFlow: Data and Deployment Specialization Browser-based Models with TensorFlow.js
1

i am getting the model summary in console log, but on the fit method some errors are coming

__________________________________________________________________________________________ tfjs@latest:17:574250
Layer (type)                Input Shape               Output shape              Param #   tfjs@latest:17:575422
========================================================================================== tfjs@latest:17:574277
flatten_Flatten4 (Flatten)  [[null,7,7,1024]]         [null,50176]              0         tfjs@latest:17:575422
__________________________________________________________________________________________ tfjs@latest:17:574364
dense_Dense7 (Dense)        [[null,50176]]            [null,100]                5017700   tfjs@latest:17:575422
__________________________________________________________________________________________ tfjs@latest:17:574364
dense_Dense8 (Dense)        [[null,100]]              [null,5]                  505       tfjs@latest:17:575422
========================================================================================== tfjs@latest:17:574364
Total params: 5018205 tfjs@latest:17:574482
Trainable params: 5018205 tfjs@latest:17:574513
Non-trainable params: 0 tfjs@latest:17:574547
__________________________________________________________________________________________

this is the error i am getting after model summary

tfjs@latest:17:574585
Uncaught (in promise) TypeError: e is null
    r https://cdn.jsdelivr.net/npm/@tensorflow/tfjs@latest:17
    phe https://cdn.jsdelivr.net/npm/@tensorflow/tfjs@latest:17
    value https://cdn.jsdelivr.net/npm/@tensorflow/tfjs@latest:17
    e https://cdn.jsdelivr.net/npm/@tensorflow/tfjs@latest:17
    h https://cdn.jsdelivr.net/npm/@tensorflow/tfjs@latest:17
    w https://cdn.jsdelivr.net/npm/@tensorflow/tfjs@latest:17
    x https://cdn.jsdelivr.net/npm/@tensorflow/tfjs@latest:17
    u https://cdn.jsdelivr.net/npm/@tensorflow/tfjs@latest:17
    o https://cdn.jsdelivr.net/npm/@tensorflow/tfjs@latest:17
    c https://cdn.jsdelivr.net/npm/@tensorflow/tfjs@latest:17
    c https://cdn.jsdelivr.net/npm/@tensorflow/tfjs@latest:17
    value https://cdn.jsdelivr.net/npm/@tensorflow/tfjs@latest:17
    e https://cdn.jsdelivr.net/npm/@tensorflow/tfjs@latest:17
    h https://cdn.jsdelivr.net/npm/@tensorflow/tfjs@latest:17
    w https://cdn.jsdelivr.net/npm/@tensorflow/tfjs@latest:17
    x https://cdn.jsdelivr.net/npm/@tensorflow/tfjs@latest:17
    u https://cdn.jsdelivr.net/npm/@tensorflow/tfjs@latest:17
    o https://cdn.jsdelivr.net/npm/@tensorflow/tfjs@latest:17
    c https://cdn.jsdelivr.net/npm/@tensorflow/tfjs@latest:17
    c https://cdn.jsdelivr.net/npm/@tensorflow/tfjs@latest:17
    value https://cdn.jsdelivr.net/npm/@tensorflow/tfjs@latest:17
    e https://cdn.jsdelivr.net/npm/@tensorflow/tfjs@latest:17
    h https://cdn.jsdelivr.net/npm/@tensorflow/tfjs@latest:17
    w https://cdn.jsdelivr.net/npm/@tensorflow/tfjs@latest:17
    x https://cdn.jsdelivr.net/npm/@tensorflow/tfjs@latest:17
    u https://cdn.jsdelivr.net/npm/@tensorflow/tfjs@latest:17
    o https://cdn.jsdelivr.net/npm/@tensorflow/tfjs@latest:17
    c https://cdn.jsdelivr.net/npm/@tensorflow/tfjs@latest:17
    c https://cdn.jsdelivr.net/npm/@tensorflow/tfjs@latest:17
    value https://cdn.jsdelivr.net/npm/@tensorflow/tfjs@latest:17
    train http://localhost:5001/C1_W4_Assignment.js:63
    doTraining http://localhost:5001/C1_W4_Assignment.js:152
    onclick http://localhost:5001/rpsls.html:1

this is the 63rd line in C1_W4_Assignment.js

  model.summary();
  let loss = 0;
  model.fit(dataset.xs, dataset.ys, {  /// 63rd line
    epochs: 10,
    callbacks: {
      onBatchEnd: async (batch, logs) => {
        loss = logs.loss.toFixed(5);
        console.log('LOSS: ' + loss);
      }
    }
  });

i am getting a window indicating model training got completed, but the training is not staring on checking the console

2

I suppose the model summary code was already given and not written by you right?

3

No, I wrote it myself to check for any issues with the model.
I think the issue might be with the data since I’m getting this on adding samples.

Uncaught Error: Error when checking : expected input_1 to have shape [null,224,224,3] but got array with shape [1,240,240,3].
    r https://cdn.jsdelivr.net/npm/@tensorflow/tfjs@latest:17
    w https://cdn.jsdelivr.net/npm/@tensorflow/tfjs@latest:17
    n https://cdn.jsdelivr.net/npm/@tensorflow/tfjs@latest:17
    dhe https://cdn.jsdelivr.net/npm/@tensorflow/tfjs@latest:17
    value https://cdn.jsdelivr.net/npm/@tensorflow/tfjs@latest:17
    handleButton http://localhost:5001/C1_W4_Assignment.js:106
    onclick http://localhost:5001/rpsls.html:1
10 tfjs@latest:17:10422
    construct self-hosted:2307
    r https://cdn.jsdelivr.net/npm/@tensorflow/tfjs@latest:17
    construct self-hosted:2307
    w https://cdn.jsdelivr.net/npm/@tensorflow/tfjs@latest:17
    n https://cdn.jsdelivr.net/npm/@tensorflow/tfjs@latest:17
    dhe https://cdn.jsdelivr.net/npm/@tensorflow/tfjs@latest:17
    value https://cdn.jsdelivr.net/npm/@tensorflow/tfjs@latest:17
    handleButton http://localhost:5001/C1_W4_Assignment.js:106
    onclick http://localhost:5001/rpsls.html:1
4

can you rather share screenshot of the console images you shared here.

5

on adding samples

image
image1195×265 50.7 KB

on model training

image
image1898×900 198 KB

6

can you confirm if you have not left any similar files in the same folder of assignment notebook you are working??

Here is what I did when I had a not so similar issue. Deleted all the files I downloaded, then re-download, and wrote codes only where it was mentioned to write the code, perse write code only where it mentioned ###YOUR CODE HERE AND END YOUR CODE HERE###

especially check the dataset xs which I suppose you have written correctly otherwise you wouldn’t be able to take the images, but it probably has a copy file, which is why it is not taking as null.

Regards
DP