Created
November 9, 2011 10:23
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sklearn precomputed kernel example
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from sklearn.datasets import load_digits | |
from sklearn.svm import SVC | |
from sklearn.utils import shuffle | |
from sklearn.metrics import zero_one_score | |
import numpy as np | |
digits = load_digits() | |
X, y = shuffle(digits.data, digits.target) | |
X_train, X_test = X[:1000, :], X[1000:, :] | |
y_train, y_test = y[:1000], y[1000:] | |
svc = SVC(kernel='precomputed') | |
kernel_train = np.dot(X_train, X_train.T) # linear kernel | |
svc.fit(kernel_train, y_train) | |
#kernel_test = np.dot(X_test, X_train[svc.support_, :].T) | |
kernel_test = np.dot(X_test, X_train.T) | |
y_pred = svc.predict(kernel_test) | |
print(zero_one_score(y_test, y_pred)) | |
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