書名： Keras Deep Learning Cookbook
作者名： Rajdeep Dua Manpreet Singh Ghotra
本章字數： 245字
更新時間： 2021-06-10 19:38:54

Putting it all together

We will be using the diabetes dataset from Pima Indians.

This dataset is originally from the National Institute of Diabetes and Digestive and Kidney Diseases. The objective of the dataset is to diagnostically predict whether or not a patient has diabetes, based on certain diagnostic measurements included in the dataset. Several constraints were placed on the selection of these instances from a larger database. In particular, all patients here are females, at least 21 years old, and of Pima Indian heritage. The datasets consist of several medical predictor variables and one target variable, outcome. Predictor variables include the number of pregnancies the patient has had, their BMI, insulin level, age, and so on.

from keras.models import Sequential
from keras.layers import Dense
import numpy
# fix random seed for reproducibility
numpy.random.seed(7)
# load pima indians dataset
dataset = numpy.loadtxt("data/diabetes.csv", delimiter=",", skiprows=1)
# split into input (X) and output (Y) variables
X = dataset[:,0:8]
Y = dataset[:,8]
# create model
model = Sequential()
model.add(Dense(12, input_dim=8, activation='relu'))
model.add(Dense(8, activation='relu'))
model.add(Dense(1, activation='sigmoid'))
# Compile model
model.compile(loss='binary_crossentropy', optimizer='adam', metrics=['accuracy'])
# Fit the model
model.fit(X, Y, epochs=150, batch_size=10)
# evaluate the model
scores = model.evaluate(X, Y)
print("\n%s: %.2f%%" % (model.metrics_names[1], scores[1]*100))

The dataset shape is (768, 9).

Let's look at the value of the dataset:

Values of X, which is columns 0 to 7:

The value of Y is the 8^th column of the dataset, as shown in the following screenshot:

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Keras Deep Learning Cookbook

Putting it all together