def _sum_item(value, border=""):
item = QStandardItem()
item.setData(value, Qt.DisplayRole)
item.setTextAlignment(Qt.AlignRight | Qt.AlignVCenter)
item.setFlags(Qt.ItemIsEnabled)
item.setFont(bold_font)
item.setData(border, BorderRole)
item.setData(QColor(192, 192, 192), BorderColorRole)
return item
def show_results(self):
minimize = self.SCORING_METHODS[self.scoring][2]
k_scores = [(k, self.SCORING_METHODS[self.scoring][1](run)) for
k, run in self.optimization_runs]
scores = list(zip(*k_scores))[1]
if minimize:
best_score, worst_score = min(scores), max(scores)
else:
best_score, worst_score = max(scores), min(scores)
best_run = scores.index(best_score)
score_span = (best_score - worst_score) or 1
max_score = max(scores)
nplaces = min(5, np.floor(abs(math.log(max(max_score, 1e-10)))) + 2)
fmt = "{{:.{}f}}".format(int(nplaces))
model = self.table_model
model.setRowCount(len(k_scores))
for i, (k, score) in enumerate(k_scores):
item = model.item(i, 0)
if item is None:
item = QStandardItem()
item.setData(k, Qt.DisplayRole)
item.setTextAlignment(Qt.AlignCenter)
model.setItem(i, 0, item)
item = model.item(i, 1)
if item is None:
item = QStandardItem()
item.setData(fmt.format(score) if not np.isnan(score) else 'out-of-memory error',
Qt.DisplayRole)
bar_ratio = 0.95 * (score - worst_score) / score_span
item.setData(bar_ratio, gui.TableBarItem.BarRole)
model.setItem(i, 1, item)
self.table_view.resizeRowsToContents()
self.table_view.selectRow(best_run)
self.table_view.show()
if minimize:
self.table_box.setTitle("Scoring (smaller is better)")
else:
self.table_box.setTitle("Scoring (bigger is better)")
QTimer.singleShot(0, self.adjustSize)
def _create_value_item(text):
item = QStandardItem()
item.setData(text, Qt.DisplayRole)
item.setTextAlignment(Qt.AlignRight | Qt.AlignVCenter)
item.setFlags(Qt.ItemIsEnabled | Qt.ItemIsSelectable)
return item
def update_stats_model(self):
# Update the results_model with up to date scores.
# Note: The target class specific scores (if requested) are
# computed as needed in this method.
model = self.score_table.model
# clear the table model, but preserving the header labels
for r in reversed(range(model.rowCount())):
model.takeRow(r)
target_index = None
if self.data is not None:
class_var = self.data.domain.class_var
if self.data.domain.has_discrete_class and \
self.class_selection != self.TARGET_AVERAGE:
target_index = class_var.values.index(self.class_selection)
else:
class_var = None
errors = []
has_missing_scores = False
names = []
for key, slot in self.learners.items():
name = learner_name(slot.learner)
names.append(name)
head = QStandardItem(name)
head.setData(key, Qt.UserRole)
results = slot.results
if results is not None and results.success:
train = QStandardItem("{:.3f}".format(
results.value.train_time))
train.setTextAlignment(Qt.AlignRight | Qt.AlignVCenter)
train.setData(key, Qt.UserRole)
test = QStandardItem("{:.3f}".format(results.value.test_time))
test.setTextAlignment(Qt.AlignRight | Qt.AlignVCenter)
test.setData(key, Qt.UserRole)
row = [head, train, test]
else:
row = [head]
if isinstance(results, Try.Fail):
head.setToolTip(str(results.exception))
head.setText("{} (error)".format(name))
head.setForeground(QtGui.QBrush(Qt.red))
if isinstance(results.exception, DomainTransformationError) \
and self.resampling == self.TestOnTest:
self.Error.test_data_incompatible()
self.Information.test_data_transformed.clear()
else:
errors.append("{name} failed with error:\n"
"{exc.__class__.__name__}: {exc!s}".format(
name=name, exc=slot.results.exception))
if class_var is not None and class_var.is_discrete and \
target_index is not None:
if slot.results is not None and slot.results.success:
ovr_results = results_one_vs_rest(slot.results.value,
target_index)
# Cell variable is used immediatelly, it's not stored
# pylint: disable=cell-var-from-loop
stats = [
Try(scorer_caller(scorer, ovr_results, target=1))
for scorer in self.scorers
]
else:
stats = None
else:
stats = slot.stats
if stats is not None:
for stat, scorer in zip(stats, self.scorers):
item = QStandardItem()
item.setTextAlignment(Qt.AlignRight | Qt.AlignVCenter)
if stat.success:
item.setData(float(stat.value[0]), Qt.DisplayRole)
else:
item.setToolTip(str(stat.exception))
if scorer.name in self.score_table.shown_scores:
has_missing_scores = True
row.append(item)
model.appendRow(row)
# Resort rows based on current sorting
header = self.score_table.view.horizontalHeader()
model.sort(header.sortIndicatorSection(), header.sortIndicatorOrder())
self._set_comparison_headers(names)
self.error("\n".join(errors), shown=bool(errors))
self.Warning.scores_not_computed(shown=has_missing_scores)
def __set_horizontal_title(self, titleh):
item = QStandardItem()
item.setData(titleh, Qt.DisplayRole)
item.setTextAlignment(Qt.AlignCenter)
self.table_model.setItem(0, self._n_leading_cols, item)
self.setSpan(0, self._n_leading_cols, 1, self._n_classesh + 3)
