本文整理汇总了Python中shogun.Classifier.LibSVM.apply方法的典型用法代码示例。如果您正苦于以下问题:Python LibSVM.apply方法的具体用法?Python LibSVM.apply怎么用?Python LibSVM.apply使用的例子?那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类shogun.Classifier.LibSVM
的用法示例。
在下文中一共展示了LibSVM.apply方法的6个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: kernel_combined_custom_poly_modular
# 需要导入模块: from shogun.Classifier import LibSVM [as 别名]
# 或者: from shogun.Classifier.LibSVM import apply [as 别名]
def kernel_combined_custom_poly_modular(fm_train_real = traindat,fm_test_real = testdat,fm_label_twoclass=label_traindat):
from shogun.Features import CombinedFeatures, RealFeatures, BinaryLabels
from shogun.Kernel import CombinedKernel, PolyKernel, CustomKernel
from shogun.Classifier import LibSVM
kernel = CombinedKernel()
feats_train = CombinedFeatures()
tfeats = RealFeatures(fm_train_real)
tkernel = PolyKernel(10,3)
tkernel.init(tfeats, tfeats)
K = tkernel.get_kernel_matrix()
kernel.append_kernel(CustomKernel(K))
subkfeats_train = RealFeatures(fm_train_real)
feats_train.append_feature_obj(subkfeats_train)
subkernel = PolyKernel(10,2)
kernel.append_kernel(subkernel)
kernel.init(feats_train, feats_train)
labels = BinaryLabels(fm_label_twoclass)
svm = LibSVM(1.0, kernel, labels)
svm.train()
kernel = CombinedKernel()
feats_pred = CombinedFeatures()
pfeats = RealFeatures(fm_test_real)
tkernel = PolyKernel(10,3)
tkernel.init(tfeats, pfeats)
K = tkernel.get_kernel_matrix()
kernel.append_kernel(CustomKernel(K))
subkfeats_test = RealFeatures(fm_test_real)
feats_pred.append_feature_obj(subkfeats_test)
subkernel = PolyKernel(10, 2)
kernel.append_kernel(subkernel)
kernel.init(feats_train, feats_pred)
svm.set_kernel(kernel)
svm.apply()
km_train=kernel.get_kernel_matrix()
return km_train,kernel
示例2: classifier_libsvm_modular
# 需要导入模块: from shogun.Classifier import LibSVM [as 别名]
# 或者: from shogun.Classifier.LibSVM import apply [as 别名]
def classifier_libsvm_modular (fm_train_real=traindat,fm_test_real=testdat,label_train_twoclass=label_traindat,width=2.1,C=1,epsilon=1e-5):
from shogun.Features import RealFeatures, Labels
from shogun.Kernel import GaussianKernel
from shogun.Classifier import LibSVM
feats_train=RealFeatures(fm_train_real)
feats_test=RealFeatures(fm_test_real)
kernel=GaussianKernel(feats_train, feats_train, width)
labels=Labels(label_train_twoclass)
svm=LibSVM(C, kernel, labels)
svm.set_epsilon(epsilon)
svm.train()
kernel.init(feats_train, feats_test)
labels = svm.apply().get_labels()
supportvectors = sv_idx=svm.get_support_vectors()
alphas=svm.get_alphas()
predictions = svm.apply()
return predictions, svm, predictions.get_labels()
示例3: classifier_custom_kernel_modular
# 需要导入模块: from shogun.Classifier import LibSVM [as 别名]
# 或者: from shogun.Classifier.LibSVM import apply [as 别名]
def classifier_custom_kernel_modular (C=1,dim=7):
from shogun.Features import RealFeatures, BinaryLabels
from shogun.Kernel import CustomKernel
from shogun.Classifier import LibSVM
from numpy import diag,ones,sign
from numpy.random import rand,seed
seed((C,dim))
lab=sign(2*rand(dim) - 1)
data=rand(dim, dim)
symdata=data*data.T + diag(ones(dim))
kernel=CustomKernel()
kernel.set_full_kernel_matrix_from_full(data)
labels=BinaryLabels(lab)
svm=LibSVM(C, kernel, labels)
svm.train()
predictions =svm.apply()
out=svm.apply().get_labels()
return svm,out
示例4: classifier_libsvm_minimal_modular
# 需要导入模块: from shogun.Classifier import LibSVM [as 别名]
# 或者: from shogun.Classifier.LibSVM import apply [as 别名]
def classifier_libsvm_minimal_modular (fm_train_real=traindat,fm_test_real=testdat,label_train_twoclass=label_traindat,width=2.1,C=1):
from shogun.Features import RealFeatures, BinaryLabels
from shogun.Classifier import LibSVM
from shogun.Kernel import GaussianKernel
feats_train=RealFeatures(fm_train_real);
feats_test=RealFeatures(fm_test_real);
kernel=GaussianKernel(feats_train, feats_train, width);
labels=BinaryLabels(label_train_twoclass);
svm=LibSVM(C, kernel, labels);
svm.train();
kernel.init(feats_train, feats_test);
out=svm.apply().get_labels();
testerr=mean(sign(out)!=label_train_twoclass)
示例5: LibSVM
# 需要导入模块: from shogun.Classifier import LibSVM [as 别名]
# 或者: from shogun.Classifier.LibSVM import apply [as 别名]
svm = LibSVM(1000.0, gk, labels)
svm.train()
lda=LDA(1,features,labels)
lda.train()
## plot points
subplot(211)
plot(pos[0,:], pos[1,:], "r.")
plot(neg[0,:], neg[1,:], "b.")
grid(True)
title('Data',size=10)
# plot ROC for SVM
subplot(223)
ROC_evaluation=ROCEvaluation()
ROC_evaluation.evaluate(svm.apply(),labels)
roc = ROC_evaluation.get_ROC()
print roc
plot(roc[0], roc[1])
fill_between(roc[0],roc[1],0,alpha=0.1)
text(mean(roc[0])/2,mean(roc[1])/2,'auROC = %.5f' % ROC_evaluation.get_auROC())
grid(True)
xlabel('FPR')
ylabel('TPR')
title('LibSVM (Gaussian kernel, C=%.3f) ROC curve' % svm.get_C1(),size=10)
# plot ROC for LDA
subplot(224)
ROC_evaluation.evaluate(lda.apply(),labels)
roc = ROC_evaluation.get_ROC()
plot(roc[0], roc[1])
示例6: xrange
# 需要导入模块: from shogun.Classifier import LibSVM [as 别名]
# 或者: from shogun.Classifier.LibSVM import apply [as 别名]
tube_epsilon=1e-2
svm=LibSVM()
svm.set_C(C, C)
svm.set_epsilon(epsilon)
svm.set_tube_epsilon(tube_epsilon)
for i in xrange(3):
data_train=random.rand(num_feats, num_vec)
data_test=random.rand(num_feats, num_vec)
feats_train=RealFeatures(data_train)
feats_test=RealFeatures(data_test)
labels=Labels(random.rand(num_vec).round()*2-1)
svm.set_kernel(LinearKernel(size_cache, scale))
svm.set_labels(labels)
kernel=svm.get_kernel()
print "kernel cache size: %s" % (kernel.get_cache_size())
kernel.init(feats_test, feats_test)
svm.train()
kernel.init(feats_train, feats_test)
print svm.apply().get_labels()
#kernel.remove_lhs_and_rhs()
#import pdb
#pdb.set_trace()