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owpreprocess.py
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owpreprocess.py
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from collections import OrderedDict
import importlib.resources
import numpy
from AnyQt.QtWidgets import (
QWidget, QButtonGroup, QGroupBox, QRadioButton, QSlider,
QDoubleSpinBox, QComboBox, QSpinBox, QListView, QLabel,
QScrollArea, QVBoxLayout, QHBoxLayout, QFormLayout,
QSizePolicy, QApplication, QCheckBox
)
from AnyQt.QtGui import (
QIcon, QStandardItemModel, QStandardItem
)
from AnyQt.QtCore import (
Qt, QEvent, QSize, QMimeData, QTimer
)
from AnyQt.QtCore import pyqtSignal as Signal, pyqtSlot as Slot
from orangewidget.gui import Slider
import Orange.data
from Orange import preprocess
from Orange.preprocess import Continuize, ProjectPCA, RemoveNaNRows, \
ProjectCUR, Scale as _Scale, Randomize as _Randomize, RemoveSparse
from Orange.widgets import widget, gui
from Orange.widgets.utils.localization import pl
from Orange.widgets.settings import Setting
from Orange.widgets.utils.overlay import OverlayWidget
from Orange.widgets.utils.sql import check_sql_input
from Orange.widgets.utils.widgetpreview import WidgetPreview
from Orange.widgets.widget import Input, Output
from Orange.preprocess import Normalize
from Orange.widgets.data.utils.preprocess import (
BaseEditor, blocked, StandardItemModel, DescriptionRole,
ParametersRole, Controller, SequenceFlow
)
class _NoneDisc(preprocess.discretize.Discretization):
"""Discretize all variables into None.
Used in combination with preprocess.Discretize to remove
all discrete features from the domain.
"""
_reprable_module = True
def __call__(self, data, variable):
return None
class DiscretizeEditor(BaseEditor):
"""
Editor for preprocess.Discretize.
"""
#: Discretize methods
NoDisc, EqualWidth, EqualFreq, Drop, EntropyMDL = 0, 1, 2, 3, 4
Discretizers = {
NoDisc: (None, {}),
EqualWidth: (preprocess.discretize.EqualWidth, {"n": 4}),
EqualFreq: (preprocess.discretize.EqualFreq, {"n": 4}),
Drop: (_NoneDisc, {}),
EntropyMDL: (preprocess.discretize.EntropyMDL, {"force": False})
}
Names = {
NoDisc: "None",
EqualWidth: "Equal width discretization",
EqualFreq: "Equal frequency discretization",
Drop: "Remove numeric features",
EntropyMDL: "Entropy-MDL discretization"
}
def __init__(self, parent=None, **kwargs):
BaseEditor.__init__(self, parent, **kwargs)
self.__method = DiscretizeEditor.EqualFreq
self.__nintervals = 4
layout = QVBoxLayout()
self.setLayout(layout)
self.__group = group = QButtonGroup(self, exclusive=True)
for method in [self.EntropyMDL, self.EqualFreq, self.EqualWidth,
self.Drop]:
rb = QRadioButton(
self, text=self.Names[method],
checked=self.__method == method
)
layout.addWidget(rb)
group.addButton(rb, method)
group.buttonClicked.connect(self.__on_buttonClicked)
self.__slbox = slbox = QGroupBox(
title="Number of intervals (for equal width/frequency)",
flat=True
)
slbox.setLayout(QHBoxLayout())
self.__slider = slider = Slider(
orientation=Qt.Horizontal,
minimum=2, maximum=10, value=self.__nintervals,
enabled=self.__method in [self.EqualFreq, self.EqualWidth],
pageStep=1, tickPosition=QSlider.TicksBelow
)
slider.valueChanged.connect(self.__on_valueChanged)
slbox.layout().addWidget(slider)
self.__slabel = slabel = QLabel()
slbox.layout().addWidget(slabel)
container = QHBoxLayout()
container.setContentsMargins(13, 0, 0, 0)
container.addWidget(slbox)
self.layout().insertLayout(3, container)
self.setSizePolicy(QSizePolicy.Minimum, QSizePolicy.Preferred)
def setMethod(self, method):
if self.__method != method:
self.__method = method
b = self.__group.button(method)
b.setChecked(True)
self.__slider.setEnabled(
method in [self.EqualFreq, self.EqualWidth]
)
self.changed.emit()
def method(self):
return self.__method
def intervals(self):
return self.__nintervals
def setIntervals(self, n):
n = numpy.clip(n, self.__slider.minimum(), self.__slider.maximum())
n = int(n)
if self.__nintervals != n:
self.__nintervals = n
# blocking signals in order to differentiate between
# changed by user (notified through __on_valueChanged) or
# changed programmatically (this)
with blocked(self.__slider):
self.__slider.setValue(n)
self.__slabel.setText(str(self.__slider.value()))
self.changed.emit()
def setParameters(self, params):
method = params.get("method", self.EqualFreq)
nintervals = params.get("n", 5)
self.setMethod(method)
if method in [self.EqualFreq, self.EqualWidth]:
self.setIntervals(nintervals)
def parameters(self):
if self.__method in [self.EqualFreq, self.EqualWidth]:
return {"method": self.__method, "n": self.__nintervals}
else:
return {"method": self.__method}
def __on_buttonClicked(self):
# on user 'method' button click
method = self.__group.checkedId()
if method != self.__method:
self.setMethod(self.__group.checkedId())
self.edited.emit()
def __on_valueChanged(self):
# on user n intervals slider change.
self.__nintervals = self.__slider.value()
self.changed.emit()
self.edited.emit()
self.__slabel.setText(str(self.__slider.value()))
@staticmethod
def createinstance(params):
params = dict(params)
method = params.pop("method", DiscretizeEditor.EqualFreq)
method, defaults = DiscretizeEditor.Discretizers[method]
if method is None:
return None
resolved = dict(defaults)
# update only keys in defaults?
resolved.update(params)
return preprocess.Discretize(method(**params), remove_const=False)
def __repr__(self):
n_int = ", Number of intervals: {}".format(self.__nintervals) \
if self.__method in [self.EqualFreq, self.EqualWidth] else ""
return "{}{}".format(self.Names[self.__method], n_int)
class ContinuizeEditor(BaseEditor):
_Type = type(Continuize.FirstAsBase)
Continuizers = OrderedDict([
(Continuize.FrequentAsBase, "Most frequent is base"),
(Continuize.Indicators, "One feature per value"),
(Continuize.RemoveMultinomial, "Remove non-binary features"),
(Continuize.Remove, "Remove categorical features"),
(Continuize.AsOrdinal, "Treat as ordinal"),
(Continuize.AsNormalizedOrdinal, "Divide by number of values")
])
def __init__(self, parent=None, **kwargs):
super().__init__(parent, **kwargs)
self.setLayout(QVBoxLayout())
self.__treatment = Continuize.Indicators
self.__group = group = QButtonGroup(exclusive=True)
group.buttonClicked.connect(self.__on_buttonClicked)
for treatment, text in ContinuizeEditor.Continuizers.items():
rb = QRadioButton(
text=text,
checked=self.__treatment == treatment)
group.addButton(rb, enum_to_index(ContinuizeEditor._Type,
treatment))
self.layout().addWidget(rb)
self.setSizePolicy(QSizePolicy.Minimum, QSizePolicy.Fixed)
def setTreatment(self, treatment):
buttonid = enum_to_index(ContinuizeEditor._Type, treatment)
b = self.__group.button(buttonid)
if b is not None:
b.setChecked(True)
self.__treatment = treatment
self.changed.emit()
def treatment(self):
return self.__treatment
def setParameters(self, params):
treatment = params.get("multinomial_treatment", Continuize.Indicators)
self.setTreatment(treatment)
def parameters(self):
return {"multinomial_treatment": self.__treatment}
def __on_buttonClicked(self):
self.__treatment = index_to_enum(
ContinuizeEditor._Type, self.__group.checkedId())
self.changed.emit()
self.edited.emit()
@staticmethod
def createinstance(params):
params = dict(params)
treatment = params.pop("multinomial_treatment", Continuize.Indicators)
return Continuize(multinomial_treatment=treatment)
def __repr__(self):
return self.Continuizers[self.__treatment]
class RemoveSparseEditor(BaseEditor):
options = ["missing values", "zeros"]
def __init__(self, parent=None, **kwargs):
super().__init__(parent, **kwargs)
self.fixedThresh = 50
self.percThresh = 5
self.useFixedThreshold = False
self.filter0 = True
self.setLayout(QVBoxLayout())
self.layout().addWidget(QLabel("Remove features with too many"))
self.filter_buttons = QButtonGroup(exclusive=True)
self.filter_buttons.buttonClicked.connect(self.filterByClicked)
for idx, option, in enumerate(self.options):
btn = QRadioButton(self, text=option, checked=idx == 1)
self.filter_buttons.addButton(btn, id=idx)
self.layout().addWidget(btn)
self.layout().addSpacing(20)
filter_settings = QGroupBox(title='Threshold:', flat=True)
filter_settings.setLayout(QFormLayout())
self.settings_buttons = QButtonGroup(exclusive=True)
self.settings_buttons.buttonClicked.connect(self.filterSettingsClicked)
btn_perc = QRadioButton(self, text='Percentage', checked=not self.useFixedThreshold)
self.settings_buttons.addButton(btn_perc, id=0)
self.percSpin = QSpinBox(minimum=0, maximum=100, value=self.percThresh,
enabled=not self.useFixedThreshold)
self.percSpin.valueChanged[int].connect(self.setPercThresh)
self.percSpin.editingFinished.connect(self.edited)
btn_fix = QRadioButton(self, text='Fixed', checked=self.useFixedThreshold)
self.settings_buttons.addButton(btn_fix, id=1)
self.fixedSpin = QSpinBox(minimum=0, maximum=1000000, value=self.fixedThresh,
enabled=self.useFixedThreshold)
self.fixedSpin.valueChanged[int].connect(self.setFixedThresh)
self.fixedSpin.editingFinished.connect(self.edited)
filter_settings.layout().addRow(btn_fix, self.fixedSpin)
filter_settings.layout().addRow(btn_perc, self.percSpin)
self.layout().addWidget(filter_settings)
def filterSettingsClicked(self):
self.setUseFixedThreshold(self.settings_buttons.checkedId())
self.percSpin.setEnabled(not self.useFixedThreshold)
self.fixedSpin.setEnabled(self.useFixedThreshold)
self.edited.emit()
def filterByClicked(self):
self.setFilter0(self.filter_buttons.checkedId())
def setFilter0(self, id_):
if self.filter0 != id_:
self.filter0 = id_
self.filter_buttons.button(id_).setChecked(True)
self.edited.emit()
def setFixedThresh(self, thresh):
if self.fixedThresh != thresh:
self.fixedThresh = thresh
self.fixedSpin.setValue(thresh)
self.edited.emit()
def setPercThresh(self, thresh):
if self.percThresh != thresh:
self.percThresh = thresh
self.percSpin.setValue(thresh)
self.edited.emit()
def setUseFixedThreshold(self, val):
if self.useFixedThreshold != val:
self.useFixedThreshold = val
self.edited.emit()
def parameters(self):
return {'fixedThresh': self.fixedThresh,
'percThresh' : self.percThresh,
'useFixedThreshold' : self.useFixedThreshold,
'filter0' : self.filter0}
def setParameters(self, params):
self.setPercThresh(params.get('percThresh', 5))
self.setFixedThresh(params.get('fixedThresh', 50))
self.setUseFixedThreshold(params.get('useFixedThreshold', False))
self.setFilter0(params.get('filter0', True))
@staticmethod
def createinstance(params):
params = dict(params)
filter0 = params.pop('filter0', True)
useFixedThreshold = params.pop('useFixedThreshold', False)
if useFixedThreshold:
threshold = params.pop('fixedThresh', 50)
else:
threshold = params.pop('percThresh', 5) / 100
return RemoveSparse(threshold, filter0)
def __repr__(self):
desc = f"remove features with too many {self.options[self.filter0]}, threshold: "
if self.useFixedThreshold:
desc += f"{self.fixedThresh} {pl(self.fixedThresh, 'instance')}"
else:
desc += f"{self.percThresh} %"
return desc
class ImputeEditor(BaseEditor):
(NoImputation, Constant, Average,
Model, Random, DropRows, DropColumns) = 0, 1, 2, 3, 4, 5, 6
Imputers = {
NoImputation: (None, {}),
# Constant: (None, {"value": 0})
Average: (preprocess.impute.Average(), {}),
# Model: (preprocess.impute.Model, {}),
Random: (preprocess.impute.Random(), {}),
DropRows: (None, {})
}
Names = {
NoImputation: "Don't impute.",
Constant: "Replace with constant",
Average: "Average/Most frequent",
Model: "Model based imputer",
Random: "Replace with random value",
DropRows: "Remove rows with missing values.",
}
def __init__(self, parent=None, **kwargs):
super().__init__(parent, **kwargs)
self.setLayout(QVBoxLayout())
self.__method = ImputeEditor.Average
self.__group = group = QButtonGroup(self, exclusive=True)
group.buttonClicked.connect(self.__on_buttonClicked)
for methodid in [self.Average, self.Random, self.DropRows]:
text = self.Names[methodid]
rb = QRadioButton(text=text, checked=self.__method == methodid)
group.addButton(rb, methodid)
self.layout().addWidget(rb)
def setMethod(self, method):
b = self.__group.button(method)
if b is not None:
b.setChecked(True)
self.__method = method
self.changed.emit()
def setParameters(self, params):
method = params.get("method", ImputeEditor.Average)
self.setMethod(method)
def parameters(self):
return {"method": self.__method}
def __on_buttonClicked(self):
self.__method = self.__group.checkedId()
self.changed.emit()
self.edited.emit()
@staticmethod
def createinstance(params):
params = dict(params)
method = params.pop("method", ImputeEditor.Average)
if method == ImputeEditor.NoImputation:
return None
elif method == ImputeEditor.Average:
return preprocess.Impute()
elif method == ImputeEditor.Model:
return preprocess.Impute(method=preprocess.impute.Model())
elif method == ImputeEditor.DropRows:
return RemoveNaNRows()
elif method == ImputeEditor.DropColumns:
return preprocess.RemoveNaNColumns()
else:
method, defaults = ImputeEditor.Imputers[method]
defaults = dict(defaults)
defaults.update(params)
return preprocess.Impute(method=method)
def __repr__(self):
return self.Names[self.__method]
class UnivariateFeatureSelect(QWidget):
changed = Signal()
edited = Signal()
#: Strategy
Fixed, Proportion, FDR, FPR, FWE = 1, 2, 3, 4, 5
def __init__(self, parent=None, **kwargs):
super().__init__(parent, **kwargs)
self.setLayout(QVBoxLayout())
self.__scoreidx = 0
self.__strategy = UnivariateFeatureSelect.Fixed
self.__k = 10
self.__p = 75.0
box = QGroupBox(title="Score", flat=True)
box.setLayout(QVBoxLayout())
self.__cb = cb = QComboBox(self, )
self.__cb.currentIndexChanged.connect(self.setScoreIndex)
self.__cb.activated.connect(self.edited)
box.layout().addWidget(cb)
self.layout().addWidget(box)
box = QGroupBox(title="Number of features", flat=True)
self.__group = group = QButtonGroup(self, exclusive=True)
self.__spins = {}
form = QFormLayout()
fixedrb = QRadioButton("Fixed:", checked=True)
group.addButton(fixedrb, UnivariateFeatureSelect.Fixed)
kspin = QSpinBox(
minimum=1, maximum=1000000, value=self.__k,
enabled=self.__strategy == UnivariateFeatureSelect.Fixed
)
kspin.valueChanged[int].connect(self.setK)
kspin.editingFinished.connect(self.edited)
self.__spins[UnivariateFeatureSelect.Fixed] = kspin
form.addRow(fixedrb, kspin)
percrb = QRadioButton("Proportion:")
group.addButton(percrb, UnivariateFeatureSelect.Proportion)
pspin = QDoubleSpinBox(
minimum=1.0, maximum=100.0, singleStep=0.5,
value=self.__p, suffix="%",
enabled=self.__strategy == UnivariateFeatureSelect.Proportion
)
pspin.valueChanged[float].connect(self.setP)
pspin.editingFinished.connect(self.edited)
self.__spins[UnivariateFeatureSelect.Proportion] = pspin
form.addRow(percrb, pspin)
# form.addRow(QRadioButton("FDR"), QDoubleSpinBox())
# form.addRow(QRadioButton("FPR"), QDoubleSpinBox())
# form.addRow(QRadioButton("FWE"), QDoubleSpinBox())
self.__group.buttonClicked.connect(self.__on_buttonClicked)
box.setLayout(form)
self.layout().addWidget(box)
def setScoreIndex(self, scoreindex):
if self.__scoreidx != scoreindex:
self.__scoreidx = scoreindex
self.__cb.setCurrentIndex(scoreindex)
self.changed.emit()
def scoreIndex(self):
return self.__scoreidx
def setStrategy(self, strategy):
if self.__strategy != strategy:
self.__strategy = strategy
b = self.__group.button(strategy)
b.setChecked(True)
for st, rb in self.__spins.items():
rb.setEnabled(st == strategy)
self.changed.emit()
def setK(self, k):
if self.__k != k:
self.__k = k
spin = self.__spins[UnivariateFeatureSelect.Fixed]
spin.setValue(k)
if self.__strategy == UnivariateFeatureSelect.Fixed:
self.changed.emit()
def setP(self, p):
if self.__p != p:
self.__p = p
spin = self.__spins[UnivariateFeatureSelect.Proportion]
spin.setValue(p)
if self.__strategy == UnivariateFeatureSelect.Proportion:
self.changed.emit()
def setItems(self, itemlist):
for item in itemlist:
self.__cb.addItem(item["text"])
def __on_buttonClicked(self):
strategy = self.__group.checkedId()
self.setStrategy(strategy)
self.edited.emit()
def setParameters(self, params):
score = params.get("score", 0)
strategy = params.get("strategy", UnivariateFeatureSelect.Fixed)
self.setScoreIndex(score)
self.setStrategy(strategy)
if strategy == UnivariateFeatureSelect.Fixed:
self.setK(params.get("k", 10))
else:
self.setP(params.get("p", 75))
def parameters(self):
score = self.__scoreidx
strategy = self.__strategy
p = self.__p
k = self.__k
return {"score": score, "strategy": strategy, "p": p, "k": k}
class FeatureSelectEditor(BaseEditor):
MEASURES = [
("Information Gain", preprocess.score.InfoGain),
("Gain ratio", preprocess.score.GainRatio),
("Gini index", preprocess.score.Gini),
("ReliefF", preprocess.score.ReliefF),
("Fast Correlation Based Filter", preprocess.score.FCBF),
("ANOVA", preprocess.score.ANOVA),
("Chi2", preprocess.score.Chi2),
("RReliefF", preprocess.score.RReliefF),
("Univariate Linear Regression", preprocess.score.UnivariateLinearRegression)
]
def __init__(self, parent=None):
super().__init__(parent)
self.setLayout(QVBoxLayout())
self.layout().setContentsMargins(0, 0, 0, 0)
self.__score = 0
self.__selecionidx = 0
self.__uni_fs = UnivariateFeatureSelect()
self.__uni_fs.setItems(
[{"text": "Information Gain", "tooltip": ""},
{"text": "Gain Ratio"},
{"text": "Gini Index"},
{"text": "ReliefF"},
{"text": "Fast Correlation Based Filter"},
{"text": "ANOVA"},
{"text": "Chi2"},
{"text": "RReliefF"},
{"text": "Univariate Linear Regression"}
]
)
self.layout().addWidget(self.__uni_fs)
self.__uni_fs.changed.connect(self.changed)
self.__uni_fs.edited.connect(self.edited)
def setParameters(self, params):
self.__uni_fs.setParameters(params)
def parameters(self):
return self.__uni_fs.parameters()
@staticmethod
def createinstance(params):
params = dict(params)
score = params.pop("score", 0)
score = FeatureSelectEditor.MEASURES[score][1]
strategy = params.get("strategy", UnivariateFeatureSelect.Fixed)
k = params.get("k", 10)
p = params.get("p", 75.0)
if strategy == UnivariateFeatureSelect.Fixed:
return preprocess.fss.SelectBestFeatures(score(), k=k)
elif strategy == UnivariateFeatureSelect.Proportion:
return preprocess.fss.SelectBestFeatures(score(), k=p / 100)
else:
raise NotImplementedError
def __repr__(self):
params = self.__uni_fs.parameters()
return "Score: {}, Strategy (Fixed): {}".format(
self.MEASURES[params["score"]][0], params["k"])
# TODO: Model based FS (random forest variable importance, ...), RFE
# Unsupervised (min variance, constant, ...)??
class RandomFeatureSelectEditor(BaseEditor):
#: Strategy
Fixed, Percentage = 1, 2
def __init__(self, parent=None, **kwargs):
super().__init__(parent, **kwargs)
self.setLayout(QVBoxLayout())
self.__strategy = RandomFeatureSelectEditor.Fixed
self.__k = 10
self.__p = 75.0
box = QGroupBox(title="Number of features", flat=True)
self.__group = group = QButtonGroup(self, exclusive=True)
self.__spins = {}
form = QFormLayout()
fixedrb = QRadioButton("Fixed", checked=True)
group.addButton(fixedrb, RandomFeatureSelectEditor.Fixed)
kspin = QSpinBox(
minimum=1, maximum=1000000, value=self.__k,
enabled=self.__strategy == RandomFeatureSelectEditor.Fixed
)
kspin.valueChanged[int].connect(self.setK)
kspin.editingFinished.connect(self.edited)
self.__spins[RandomFeatureSelectEditor.Fixed] = kspin
form.addRow(fixedrb, kspin)
percrb = QRadioButton("Percentage")
group.addButton(percrb, RandomFeatureSelectEditor.Percentage)
pspin = QDoubleSpinBox(
minimum=0.0, maximum=100.0, singleStep=0.5,
value=self.__p, suffix="%",
enabled=self.__strategy == RandomFeatureSelectEditor.Percentage
)
pspin.valueChanged[float].connect(self.setP)
pspin.editingFinished.connect(self.edited)
self.__spins[RandomFeatureSelectEditor.Percentage] = pspin
form.addRow(percrb, pspin)
self.__group.buttonClicked.connect(self.__on_buttonClicked)
box.setLayout(form)
self.layout().addWidget(box)
def setStrategy(self, strategy):
if self.__strategy != strategy:
self.__strategy = strategy
b = self.__group.button(strategy)
b.setChecked(True)
for st, rb in self.__spins.items():
rb.setEnabled(st == strategy)
self.changed.emit()
def setK(self, k):
if self.__k != k:
self.__k = k
spin = self.__spins[RandomFeatureSelectEditor.Fixed]
spin.setValue(k)
if self.__strategy == RandomFeatureSelectEditor.Fixed:
self.changed.emit()
def setP(self, p):
if self.__p != p:
self.__p = p
spin = self.__spins[RandomFeatureSelectEditor.Percentage]
spin.setValue(p)
if self.__strategy == RandomFeatureSelectEditor.Percentage:
self.changed.emit()
def __on_buttonClicked(self):
strategy = self.__group.checkedId()
self.setStrategy(strategy)
self.edited.emit()
def setParameters(self, params):
strategy = params.get("strategy", RandomFeatureSelectEditor.Fixed)
self.setStrategy(strategy)
if strategy == RandomFeatureSelectEditor.Fixed:
self.setK(params.get("k", 10))
else:
self.setP(params.get("p", 75.0))
def parameters(self):
strategy = self.__strategy
p = self.__p
k = self.__k
return {"strategy": strategy, "p": p, "k": k}
@staticmethod
def createinstance(params):
params = dict(params)
strategy = params.get("strategy", RandomFeatureSelectEditor.Fixed)
k = params.get("k", 10)
p = params.get("p", 75.0)
if strategy == RandomFeatureSelectEditor.Fixed:
return preprocess.fss.SelectRandomFeatures(k=k)
elif strategy == RandomFeatureSelectEditor.Percentage:
return preprocess.fss.SelectRandomFeatures(k=p/100)
else:
# further implementations
raise NotImplementedError
def __repr__(self):
if self.__strategy == self.Fixed:
return f"select {self.__k} {pl(self.__k,'feature')}"
else:
return f"select {self.__p} % features"
def index_to_enum(enum, i):
"""Enums, by default, are not int-comparable, so use an ad-hoc mapping of
int to enum value at that position"""
return list(enum)[i]
def enum_to_index(enum, key):
"""Enums, by default, are not int-comparable, so use an ad-hoc mapping of
enum key to its int position"""
return list(enum).index(key)
class Scale(BaseEditor):
CenterByMean, ScaleBySD, NormalizeBySD, NormalizeBySpan_ZeroBased, \
NormalizeSpan_NonZeroBased = 0, 1, 2, 3, 4
Names = {
NormalizeBySD: "Standardize to μ=0, σ²=1",
CenterByMean: "Center to μ=0",
ScaleBySD: "Scale to σ²=1",
NormalizeSpan_NonZeroBased: "Normalize to interval [-1, 1]",
NormalizeBySpan_ZeroBased: "Normalize to interval [0, 1]",
}
def __init__(self, parent=None, **kwargs):
super().__init__(parent, **kwargs)
self.setLayout(QVBoxLayout())
self.__method = Scale.NormalizeBySD
self.__group = group = QButtonGroup(self, exclusive=True)
group.buttonClicked.connect(self.__on_buttonClicked)
for methodid in [self.NormalizeBySD, self.CenterByMean, self.ScaleBySD,
self.NormalizeSpan_NonZeroBased,
self.NormalizeBySpan_ZeroBased]:
text = self.Names[methodid]
rb = QRadioButton(text=text, checked=self.__method == methodid)
group.addButton(rb, methodid)
self.layout().addWidget(rb)
def setMethod(self, method):
b = self.__group.button(method)
if b is not None:
b.setChecked(True)
self.__method = method
self.changed.emit()
def setParameters(self, params):
method = params.get("method", Scale.NormalizeBySD)
self.setMethod(method)
def parameters(self):
return {"method": self.__method}
def __on_buttonClicked(self):
self.__method = self.__group.checkedId()
self.changed.emit()
self.edited.emit()
@staticmethod
def createinstance(params):
method = params.get("method", Scale.NormalizeBySD)
if method == Scale.CenterByMean:
return _Scale(_Scale.CenteringType.Mean,
_Scale.ScalingType.NoScaling)
elif method == Scale.ScaleBySD:
return _Scale(_Scale.CenteringType.NoCentering,
_Scale.ScalingType.Std)
elif method == Scale.NormalizeBySD:
return Normalize(norm_type=Normalize.NormalizeBySD)
elif method == Scale.NormalizeBySpan_ZeroBased:
return Normalize(norm_type=Normalize.NormalizeBySpan)
else: # method == Scale.NormalizeSpan_NonZeroBased
return Normalize(norm_type=Normalize.NormalizeBySpan,
zero_based=False)
def __repr__(self):
return self.Names[self.__method]
class Randomize(BaseEditor):
RandomizeClasses, RandomizeAttributes, RandomizeMetas = _Randomize.Type
def __init__(self, parent=None, **kwargs):
super().__init__(parent, **kwargs)
self.setLayout(QVBoxLayout())
form = QFormLayout()
self.__rand_type_cb = QComboBox()
self.__rand_type_cb.addItems(["Classes",
"Features",
"Meta data"])
self.__rand_type_cb.currentIndexChanged.connect(self.changed)
self.__rand_type_cb.activated.connect(self.edited)
self.__rand_seed_ch = QCheckBox()
self.__rand_seed_ch.clicked.connect(self.edited)
form.addRow("Randomize:", self.__rand_type_cb)
form.addRow("Replicable shuffling:", self.__rand_seed_ch)
self.layout().addLayout(form)
def setParameters(self, params):
rand_type = params.get("rand_type", Randomize.RandomizeClasses)
self.__rand_type_cb.setCurrentIndex(
enum_to_index(_Randomize.Type, rand_type))
self.__rand_seed_ch.setChecked(params.get("rand_seed", 1) or 0)
def parameters(self):
return {"rand_type": index_to_enum(_Randomize.Type,
self.__rand_type_cb.currentIndex()),
"rand_seed": 1 if self.__rand_seed_ch.isChecked() else None}
@staticmethod
def createinstance(params):
rand_type = params.get("rand_type", Randomize.RandomizeClasses)
rand_seed = params.get("rand_seed", 1)
return _Randomize(rand_type=rand_type, rand_seed=rand_seed)
def __repr__(self):
return "{}, {}".format(self.__rand_type_cb.currentText(),
"Replicable" if self.__rand_seed_ch.isChecked()
else "Not replicable")
class PCA(BaseEditor):
def __init__(self, parent=None, **kwargs):
super().__init__(parent, **kwargs)
self.setLayout(QVBoxLayout())
self.n_components = 10
form = QFormLayout()
self.cspin = QSpinBox(minimum=1, value=self.n_components)
self.cspin.valueChanged[int].connect(self.setC)
self.cspin.editingFinished.connect(self.edited)
form.addRow("Components:", self.cspin)
self.layout().addLayout(form)
def setParameters(self, params):
self.n_components = params.get("n_components", 10)
def parameters(self):
return {"n_components": self.n_components}
def setC(self, n_components):
if self.n_components != n_components:
self.n_components = n_components
self.cspin.setValue(n_components)
self.changed.emit()
@staticmethod
def createinstance(params):
n_components = params.get("n_components", 10)
return ProjectPCA(n_components=n_components)
def __repr__(self):
return "Components: {}".format(self.cspin.value())
class CUR(BaseEditor):
def __init__(self, parent=None, **kwargs):
super().__init__(parent, **kwargs)
self.setLayout(QVBoxLayout())
self.rank = 10
self.max_error = 1
form = QFormLayout()
self.rspin = QSpinBox(minimum=2, maximum=1000000, value=self.rank)
self.rspin.valueChanged[int].connect(self.setR)
self.rspin.editingFinished.connect(self.edited)
self.espin = QDoubleSpinBox(
minimum=0.1, maximum=100.0, singleStep=0.1,
value=self.max_error)
self.espin.valueChanged[float].connect(self.setE)
self.espin.editingFinished.connect(self.edited)
form.addRow("Rank:", self.rspin)
form.addRow("Relative error:", self.espin)
self.layout().addLayout(form)
def setParameters(self, params):
self.setR(params.get("rank", 10))
self.setE(params.get("max_error", 1))
def parameters(self):
return {"rank": self.rank, "max_error": self.max_error}
def setR(self, rank):
if self.rank != rank:
self.rank = rank
self.rspin.setValue(rank)
self.changed.emit()
def setE(self, max_error):
if self.max_error != max_error:
self.max_error = max_error
self.espin.setValue(max_error)
self.changed.emit()
@staticmethod
def createinstance(params):
rank = params.get("rank", 10)
max_error = params.get("max_error", 1)
return ProjectCUR(rank=rank, max_error=max_error)
def __repr__(self):
return "Rank: {}, Relative error: {}".format(self.rspin.value(),
self.espin.value())
# This is intended for future improvements.
# I.e. it should be possible to add/register preprocessor actions
# through entry points (for use by add-ons). Maybe it should be a
# general framework (this is not the only place where such
# functionality is desired (for instance in Orange v2.* Rank widget
# already defines its own entry point).
class Description:
"""
A description of an action/function.
"""
def __init__(self, title, icon=None, summary=None, input_=None, output=None,
requires=None, note=None, related=None, keywords=None,
helptopic=None):
self.title = title
self.icon = icon
self.summary = summary
self.input = input_
self.output = output
self.requires = requires
self.note = note
self.related = related
self.keywords = keywords
self.helptopic = helptopic
class PreprocessAction:
def __init__(self, name, qualname, category, description, viewclass):
self.name = name
self.qualname = qualname
self.category = category
self.description = description
self.viewclass = viewclass
def icon_path(basename):
path = importlib.resources.files(__package__).joinpath("icons/" + basename)
return str(path)
PREPROCESS_ACTIONS = [