Understanding the Resale Reason in Keras Binary Classification Problem
I am doing a binary classification of IMDB movie viewing data in positive or negative mood.
I have 25k movie reviews and related labels.
Preliminary processing:
Removed stop words and data separation for training and testing 70:30. So, 17.5 thousand workouts and 7k test. 17.5k training was further subdivided into 14k Trains and 3.5k Validation datasets used in the keras.model.fit method.
Each rendered movie preview was converted to a TF-IDF vector using the Keras word processing module.
Here is my fully connected architecture that I used in the Keras Dense class
def model_param(self):
""" Method to do deep learning
"""
from keras.models import Sequential
from keras.layers import Dense, Dropout, Activation
from keras.optimizers import SGD
from keras import regularizers
self.model = Sequential()
# Dense(64) is a fully-connected layer with 64 hidden units.
# in the first layer, you must specify the expected input data shape:
# here, 20-dimensional vectors.
self.model.add(Dense(32, activation='relu', input_dim=self.x_train_std.shape[1]))
self.model.add(Dropout(0.5))
#self.model.add(Dense(60, activation='relu'))
#self.model.add(Dropout(0.5))
self.model.add(Dense(1, activation='sigmoid'))
sgd = SGD(lr=0.01, decay=1e-6, momentum=0.9, nesterov=True)
self.model.compile(loss='binary_crossentropy',
optimizer=sgd,
metrics=['accuracy'])
def fit(self):
""" Training the deep learning network on the training data
"""
self.model.fit(self.x_train_std, self.y_train,validation_split=0.20,
epochs=50,
batch_size=128)
As you can see, I tried first without Dropout and as usual I got the training precision as 1.0, but the validation was bad as overfitting happens. So I added Dropout to prevent overfitting
However, despite trying multiple dropout rates, adding another layer with another is not. units in it, changing the learning rate. I am still revising the validation dataset. It turns out to be 85%, and the workout continues to grow to 99%, and so on. Even changed eras from 10 to 50
What could be wrong here.
Train on 14000 samples, validate on 3500 samples
Epoch 1/50
14000/14000 [==============================] - 0s - loss: 0.5684 - acc: 0.7034 - val_loss: 0.3794 - val_acc: 0.8431
Epoch 2/50
14000/14000 [==============================] - 0s - loss: 0.3630 - acc: 0.8388 - val_loss: 0.3304 - val_acc: 0.8549
Epoch 3/50
14000/14000 [==============================] - 0s - loss: 0.2977 - acc: 0.8749 - val_loss: 0.3271 - val_acc: 0.8591
Epoch 4/50
14000/14000 [==============================] - 0s - loss: 0.2490 - acc: 0.8991 - val_loss: 0.3302 - val_acc: 0.8580
Epoch 5/50
14000/14000 [==============================] - 0s - loss: 0.2251 - acc: 0.9086 - val_loss: 0.3388 - val_acc: 0.8546
Epoch 6/50
14000/14000 [==============================] - 0s - loss: 0.2021 - acc: 0.9189 - val_loss: 0.3532 - val_acc: 0.8523
Epoch 7/50
14000/14000 [==============================] - 0s - loss: 0.1797 - acc: 0.9286 - val_loss: 0.3670 - val_acc: 0.8529
Epoch 8/50
14000/14000 [==============================] - 0s - loss: 0.1611 - acc: 0.9350 - val_loss: 0.3860 - val_acc: 0.8543
Epoch 9/50
14000/14000 [==============================] - 0s - loss: 0.1427 - acc: 0.9437 - val_loss: 0.4077 - val_acc: 0.8529
Epoch 10/50
14000/14000 [==============================] - 0s - loss: 0.1344 - acc: 0.9476 - val_loss: 0.4234 - val_acc: 0.8526
Epoch 11/50
14000/14000 [==============================] - 0s - loss: 0.1222 - acc: 0.9534 - val_loss: 0.4473 - val_acc: 0.8506
Epoch 12/50
14000/14000 [==============================] - 0s - loss: 0.1131 - acc: 0.9546 - val_loss: 0.4718 - val_acc: 0.8497
Epoch 13/50
14000/14000 [==============================] - 0s - loss: 0.1079 - acc: 0.9559 - val_loss: 0.4818 - val_acc: 0.8526
Epoch 14/50
14000/14000 [==============================] - 0s - loss: 0.0954 - acc: 0.9630 - val_loss: 0.5057 - val_acc: 0.8494
Epoch 15/50
14000/14000 [==============================] - 0s - loss: 0.0906 - acc: 0.9636 - val_loss: 0.5229 - val_acc: 0.8557
Epoch 16/50
14000/14000 [==============================] - 0s - loss: 0.0896 - acc: 0.9657 - val_loss: 0.5387 - val_acc: 0.8497
Epoch 17/50
14000/14000 [==============================] - 0s - loss: 0.0816 - acc: 0.9666 - val_loss: 0.5579 - val_acc: 0.8463
Epoch 18/50
14000/14000 [==============================] - 0s - loss: 0.0762 - acc: 0.9709 - val_loss: 0.5704 - val_acc: 0.8491
Epoch 19/50
14000/14000 [==============================] - 0s - loss: 0.0718 - acc: 0.9723 - val_loss: 0.5834 - val_acc: 0.8454
Epoch 20/50
14000/14000 [==============================] - 0s - loss: 0.0633 - acc: 0.9752 - val_loss: 0.6032 - val_acc: 0.8494
Epoch 21/50
14000/14000 [==============================] - 0s - loss: 0.0687 - acc: 0.9724 - val_loss: 0.6181 - val_acc: 0.8480
Epoch 22/50
14000/14000 [==============================] - 0s - loss: 0.0614 - acc: 0.9762 - val_loss: 0.6280 - val_acc: 0.8503
Epoch 23/50
14000/14000 [==============================] - 0s - loss: 0.0620 - acc: 0.9756 - val_loss: 0.6407 - val_acc: 0.8500
Epoch 24/50
14000/14000 [==============================] - 0s - loss: 0.0536 - acc: 0.9794 - val_loss: 0.6563 - val_acc: 0.8511
Epoch 25/50
14000/14000 [==============================] - 0s - loss: 0.0538 - acc: 0.9791 - val_loss: 0.6709 - val_acc: 0.8500
Epoch 26/50
14000/14000 [==============================] - 0s - loss: 0.0507 - acc: 0.9807 - val_loss: 0.6869 - val_acc: 0.8491
Epoch 27/50
14000/14000 [==============================] - 0s - loss: 0.0528 - acc: 0.9794 - val_loss: 0.7002 - val_acc: 0.8483
Epoch 28/50
14000/14000 [==============================] - 0s - loss: 0.0465 - acc: 0.9810 - val_loss: 0.7083 - val_acc: 0.8469
Epoch 29/50
14000/14000 [==============================] - 0s - loss: 0.0504 - acc: 0.9796 - val_loss: 0.7153 - val_acc: 0.8497
Epoch 30/50
14000/14000 [==============================] - 0s - loss: 0.0477 - acc: 0.9819 - val_loss: 0.7232 - val_acc: 0.8480
Epoch 31/50
14000/14000 [==============================] - 0s - loss: 0.0475 - acc: 0.9819 - val_loss: 0.7343 - val_acc: 0.8469
Epoch 32/50
14000/14000 [==============================] - 0s - loss: 0.0459 - acc: 0.9819 - val_loss: 0.7352 - val_acc: 0.8500
Epoch 33/50
14000/14000 [==============================] - 0s - loss: 0.0426 - acc: 0.9807 - val_loss: 0.7429 - val_acc: 0.8511
Epoch 34/50
14000/14000 [==============================] - 0s - loss: 0.0396 - acc: 0.9846 - val_loss: 0.7576 - val_acc: 0.8477
Epoch 35/50
14000/14000 [==============================] - 0s - loss: 0.0420 - acc: 0.9836 - val_loss: 0.7603 - val_acc: 0.8506
Epoch 36/50
14000/14000 [==============================] - 0s - loss: 0.0359 - acc: 0.9856 - val_loss: 0.7683 - val_acc: 0.8497
Epoch 37/50
14000/14000 [==============================] - 0s - loss: 0.0377 - acc: 0.9849 - val_loss: 0.7823 - val_acc: 0.8520
Epoch 38/50
14000/14000 [==============================] - 0s - loss: 0.0352 - acc: 0.9861 - val_loss: 0.7912 - val_acc: 0.8500
Epoch 39/50
14000/14000 [==============================] - 0s - loss: 0.0390 - acc: 0.9845 - val_loss: 0.8025 - val_acc: 0.8489
Epoch 40/50
14000/14000 [==============================] - 0s - loss: 0.0371 - acc: 0.9853 - val_loss: 0.8128 - val_acc: 0.8494
Epoch 41/50
14000/14000 [==============================] - 0s - loss: 0.0367 - acc: 0.9848 - val_loss: 0.8184 - val_acc: 0.8503
Epoch 42/50
14000/14000 [==============================] - 0s - loss: 0.0331 - acc: 0.9871 - val_loss: 0.8264 - val_acc: 0.8500
Epoch 43/50
14000/14000 [==============================] - 0s - loss: 0.0338 - acc: 0.9871 - val_loss: 0.8332 - val_acc: 0.8483
Epoch 44/50
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