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import random | ||
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from AnyQt.QtCore import Qt | ||
from AnyQt.QtWidgets import QSizePolicy | ||
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from Orange.data import Table | ||
from Orange.preprocess import Randomize | ||
from Orange.widgets.settings import Setting | ||
from Orange.widgets.widget import OWWidget | ||
from Orange.widgets import gui | ||
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class OWRandomize(OWWidget): | ||
name = "Randomize" | ||
description = "Randomize features, class and/or metas in data table." | ||
icon = "icons/Random.svg" | ||
priority = 2100 | ||
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inputs = [("Data", Table, "set_data")] | ||
outputs = [("Data", Table)] | ||
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resizing_enabled = False | ||
want_main_area = False | ||
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shuffle_class = Setting(1) | ||
shuffle_attrs = Setting(0) | ||
shuffle_metas = Setting(0) | ||
scope_prop = Setting(80) | ||
random_seed = Setting(0) | ||
auto_apply = Setting(True) | ||
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def __init__(self): | ||
super().__init__() | ||
self.data = None | ||
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# GUI | ||
box = gui.vBox(self.controlArea, "Shuffle") | ||
self.class_check = gui.checkBox( | ||
box, self, "shuffle_class", "Classes", | ||
callback=self._shuffle_check_changed) | ||
self.attrs_check = gui.checkBox( | ||
box, self, "shuffle_attrs", "Features", | ||
callback=self._shuffle_check_changed) | ||
self.metas_check = gui.checkBox( | ||
box, self, "shuffle_metas", "Metas", | ||
callback=self._shuffle_check_changed) | ||
gui.separator(box, 10, 10) | ||
self.replicable_check = gui.checkBox( | ||
box, self, "random_seed", "Replicable shuffling", | ||
callback=self._shuffle_check_changed) | ||
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box = gui.vBox(self.controlArea, "Scope") | ||
hbox = gui.hBox(box) | ||
gui.widgetLabel(hbox, "No data") | ||
self.scope_slider = gui.hSlider( | ||
hbox, self, "scope_prop", minValue=0, maxValue=100, width=140, | ||
createLabel=False, callback=self._scope_slider_changed) | ||
gui.widgetLabel(hbox, "All data") | ||
self.scope_label = gui.widgetLabel( | ||
box, "", alignment=Qt.AlignCenter, | ||
sizePolicy=(QSizePolicy.MinimumExpanding, QSizePolicy.Fixed)) | ||
self._set_scope_label() | ||
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self.apply_button = gui.auto_commit( | ||
self.controlArea, self, "auto_apply", "&Apply", | ||
box=False, commit=self.apply) | ||
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def _shuffle_check_changed(self): | ||
self.apply() | ||
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def _scope_slider_changed(self): | ||
self._set_scope_label() | ||
self.apply() | ||
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def _set_scope_label(self): | ||
self.scope_label.setText("{}%".format(self.scope_prop)) | ||
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def set_data(self, data): | ||
self.data = data | ||
self.apply() | ||
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def apply(self): | ||
data = None | ||
if self.data: | ||
rand_seed = self.random_seed or None | ||
_type = Randomize.RandomizeClasses * self.shuffle_class | \ | ||
Randomize.RandomizeAttributes * self.shuffle_attrs | \ | ||
Randomize.RandomizeMetas * self.shuffle_metas | ||
size = int(len(self.data) * self.scope_prop / 100) | ||
random.seed(rand_seed) | ||
indices = sorted(random.sample(range(len(self.data)), size)) | ||
randomized = Randomize(_type, rand_seed)(self.data[indices]) | ||
data = self.data.copy() | ||
for i, instance in zip(indices, randomized): | ||
data[i] = instance | ||
self.send("Data", data) | ||
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def send_report(self): | ||
text = "No shuffling" | ||
labels = ["Classes", "Features", "Metas"] | ||
include = [self.shuffle_class, self.shuffle_attrs, self.shuffle_metas] | ||
if sum(include): | ||
text = ", ".join([l for i, l in zip(include, labels) if i]) | ||
self.report_items("Settings", | ||
[("Shuffle", text), | ||
("Scope", "{}% of data".format(self.scope_prop)), | ||
("Replicable", ["no", "yes"][self.random_seed])]) | ||
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if __name__ == "__main__": | ||
from AnyQt.QtWidgets import QApplication | ||
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app = QApplication([]) | ||
ow = OWRandomize() | ||
d = Table("iris") | ||
ow.set_data(d) | ||
ow.show() | ||
app.exec_() | ||
ow.saveSettings() |
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# Test methods with long descriptive names can omit docstrings | ||
# pylint: disable=missing-docstring | ||
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import numpy as np | ||
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from Orange.data import Table | ||
from Orange.widgets.data.owrandomize import OWRandomize | ||
from Orange.widgets.tests.base import WidgetTest | ||
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class TestOWRandomize(WidgetTest): | ||
@classmethod | ||
def setUpClass(cls): | ||
super().setUpClass() | ||
cls.zoo = Table("zoo") | ||
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def setUp(self): | ||
self.widget = self.create_widget(OWRandomize) | ||
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def test_data(self): | ||
"""Check widget's data and output with data on the input""" | ||
self.assertEqual(self.widget.data, None) | ||
self.send_signal("Data", self.zoo) | ||
self.assertEqual(self.widget.data, self.zoo) | ||
output = self.get_output("Data") | ||
np.testing.assert_array_equal(output.X, self.zoo.X) | ||
np.testing.assert_array_equal(output.metas, self.zoo.metas) | ||
self.assertTrue((output.Y != self.zoo.Y).any()) | ||
self.assertTrue((np.sort(output.Y, axis=0) == | ||
np.sort(self.zoo.Y, axis=0)).all()) | ||
self.send_signal("Data", None) | ||
self.assertEqual(self.widget.data, None) | ||
self.assertIsNone(self.get_output("Data")) | ||
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def test_shuffling(self): | ||
"""Check widget's output for all types of shuffling""" | ||
self.send_signal("Data", self.zoo) | ||
self.widget.class_check.setChecked(True) | ||
self.widget.attrs_check.setChecked(True) | ||
self.widget.metas_check.setChecked(True) | ||
output = self.get_output("Data") | ||
self.assertTrue((output.X != self.zoo.X).any()) | ||
self.assertTrue((np.sort(output.X, axis=0) == | ||
np.sort(self.zoo.X, axis=0)).all()) | ||
self.assertTrue((output.Y != self.zoo.Y).any()) | ||
self.assertTrue((np.sort(output.Y, axis=0) == | ||
np.sort(self.zoo.Y, axis=0)).all()) | ||
self.assertTrue((output.metas != self.zoo.metas).any()) | ||
self.assertTrue((np.sort(output.metas, axis=0) == | ||
np.sort(self.zoo.metas, axis=0)).all()) | ||
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def test_scope(self): | ||
self.send_signal("Data", self.zoo) | ||
output = self.get_output("Data") | ||
n_zoo = len(self.zoo) | ||
s = int(self.widget.scope_prop / 100 * n_zoo) | ||
self.assertGreater(sum((output.Y == self.zoo.Y).astype(int)), n_zoo - s) | ||
self.assertLessEqual(sum((output.Y != self.zoo.Y).astype(int)), s) | ||
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def test_replicable_shuffling(self): | ||
"""Check widget's output for replicable shuffling """ | ||
self.send_signal("Data", self.zoo) | ||
self.widget.replicable_check.setChecked(True) | ||
output = self.get_output("Data") | ||
np.testing.assert_array_equal(output.X, self.zoo.X) | ||
np.testing.assert_array_equal(output.metas, self.zoo.metas) | ||
self.assertTrue((output.Y != self.zoo.Y).any()) | ||
self.assertTrue((np.sort(output.Y, axis=0) == | ||
np.sort(self.zoo.Y, axis=0)).all()) | ||
self.widget.apply() | ||
output2 = self.get_output("Data") | ||
np.testing.assert_array_equal(output.X, output2.X) | ||
np.testing.assert_array_equal(output.Y, output2.Y) | ||
np.testing.assert_array_equal(output.metas, output2.metas) |
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Randomize | ||
========= | ||
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.. figure:: icons/randomize.png | ||
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Shuffles classes, features and/or metas of data. | ||
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Signals | ||
------- | ||
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**Inputs**: | ||
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- **Data** | ||
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Data set. | ||
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**Outputs**: | ||
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- **Data** | ||
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Randomized data set. | ||
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Description | ||
----------- | ||
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A simple widget that shuffles classes, features and/or metas of data. |