本文整理汇总了Python中weka.filters.Filter.set_property方法的典型用法代码示例。如果您正苦于以下问题：Python Filter.set_property方法的具体用法？Python Filter.set_property怎么用？Python Filter.set_property使用的例子？那么恭喜您, 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weka.filters.Filter的用法示例。
在下文中一共展示了Filter.set_property方法的2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: use_filter
# 需要导入模块: from weka.filters import Filter [as 别名]
# 或者: from weka.filters.Filter import set_property [as 别名]
def use_filter(data):
"""
Uses the AttributeSelection filter for attribute selection.
:param data: the dataset to use
:type data: Instances
"""
print("\n2. Filter")
flter = Filter(classname="weka.filters.supervised.attribute.AttributeSelection")
aseval = ASEvaluation(classname="weka.attributeSelection.CfsSubsetEval")
assearch = ASSearch(classname="weka.attributeSelection.GreedyStepwise", options=["-B"])
flter.set_property("evaluator", aseval.jobject)
flter.set_property("search", assearch.jobject)
flter.inputformat(data)
filtered = flter.filter(data)
print(str(filtered))示例2: main
# 需要导入模块: from weka.filters import Filter [as 别名]
# 或者: from weka.filters.Filter import set_property [as 别名]
def main():
"""
Just runs some example code.
"""
# load a dataset
data_file = helper.get_data_dir() + os.sep + "vote.arff"
helper.print_info("Loading dataset: " + data_file)
loader = Loader("weka.core.converters.ArffLoader")
data = loader.load_file(data_file)
data.class_is_last()
# classifier
classifier = Classifier(classname="weka.classifiers.trees.J48")
# randomize data
folds = 10
seed = 1
rnd = Random(seed)
rand_data = Instances.copy_instances(data)
rand_data.randomize(rnd)
if rand_data.class_attribute.is_nominal:
rand_data.stratify(folds)
# perform cross-validation and add predictions
predicted_data = None
evaluation = Evaluation(rand_data)
for i in xrange(folds):
train = rand_data.train_cv(folds, i)
# the above code is used by the StratifiedRemoveFolds filter,
# the following code is used by the Explorer/Experimenter
# train = rand_data.train_cv(folds, i, rnd)
test = rand_data.test_cv(folds, i)
# build and evaluate classifier
cls = Classifier.make_copy(classifier)
cls.build_classifier(train)
evaluation.test_model(cls, test)
# add predictions
addcls = Filter(
classname="weka.filters.supervised.attribute.AddClassification",
options=["-classification", "-distribution", "-error"])
# setting the java object directory avoids issues with correct quoting in option array
addcls.set_property("classifier", Classifier.make_copy(classifier))
addcls.inputformat(train)
addcls.filter(train) # trains the classifier
pred = addcls.filter(test)
if predicted_data is None:
predicted_data = Instances.template_instances(pred, 0)
for n in xrange(pred.num_instances):
predicted_data.add_instance(pred.get_instance(n))
print("")
print("=== Setup ===")
print("Classifier: " + classifier.to_commandline())
print("Dataset: " + data.relationname)
print("Folds: " + str(folds))
print("Seed: " + str(seed))
print("")
print(evaluation.summary("=== " + str(folds) + " -fold Cross-Validation ==="))
print("")
print(predicted_data)