Att överleva ett meteornedslagˈ

Introduktion till djupinlärning med Keras

Miguel Esteban

Data Scientist & Founder

Sammanfattning

from tensorflow.keras.models import Sequential
from tensorflow.keras.layers import Dense

# Create a new sequential model
model = Sequential()

# Add and input and dense layer
model.add(Dense(2, input_shape=(3,),
                activation="relu"))

# Add a final 1 neuron layer
model.add(Dense(1))
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Kompilering

# Compiling your previously built model
model.compile(optimizer="adam", loss="mse")

Träning

# Train your model
model.fit(X_train, y_train, epochs=5)

Epoch 1/5
1000/1000 [==============================] - 0s 242us/step - loss: 0.4090
Epoch 2/5
1000/1000 [==============================] - 0s 34us/step - loss: 0.3602
Epoch 3/5
1000/1000 [==============================] - 0s 37us/step - loss: 0.3223
Epoch 4/5
1000/1000 [==============================] - 0s 34us/step - loss: 0.2958
Epoch 5/5
1000/1000 [==============================] - 0s 33us/step - loss: 0.2795

Prediktion

# Predict on new data
preds = model.predict(X_test)

# Look at the predictions
print(preds)

array([[0.6131608 ],
       [0.5175948 ],
       [0.60209155],
       ...,
       [0.55633   ],
       [0.5305591 ],
       [0.50682044]])

Utvärdering

# Evaluate your results
model.evaluate(X_test, y_test)

1000/1000 [==============================] - 0s 53us/step
0.25

Att överleva ett meteornedslagˈ

Sammanfattning

Kompilering

Träning

Prediktion

Utvärdering

Problemet vi löser

Vetenskaplig prediktion

Din uppgift

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