Merge pull request #3766 from rokgomiscek/cumulativeDistribution

[ENH] OWDistributions: add cumulative distribution

Orange/widgets/visualize/owdistributions.py

@@ -154,6 +154,7 @@ class Inputs:

    relative_freq = settings.Setting(False)
    disc_cont = settings.Setting(False)
    cumulative_distr = settings.Setting(False)

    smoothing_index = settings.Setting(5)
    show_prob = settings.ContextSetting(0)
@@ -189,6 +190,10 @@ def __init__(self):
        self.varview.selectionModel().selectionChanged.connect(
            self._on_variable_idx_changed)
        varbox.layout().addWidget(self.varview)
        gui.checkBox(
            varbox, self, "cumulative_distr", "Cumulative distribution",
            callback=self._on_cumulative_distr_changed,
            tooltip="Show the cumulative distribution function.")

        box = gui.vBox(self.controlArea, "Precision")

@@ -368,6 +373,7 @@ def _setup(self):
            self.var = data.domain[0]
        self.set_left_axis_name()
        self.enable_disable_rel_freq()
        self.controls.cumulative_distr.setDisabled(not self.var.is_continuous)
        if self.cvar:
            self.contingencies = \
                contingency.get_contingency(data, self.var, self.cvar)
@@ -416,6 +422,9 @@ def display_distribution(self):
                                     smoothing_factor=self.smoothing_factor)
            edges = edges + (edges[1] - edges[0])/2
            edges = edges[:-1]
            if self.cumulative_distr:
                dx = edges[1] - edges[0]
                curve = numpy.cumsum(curve) * dx
            item = pg.PlotCurveItem()
            pen = QPen(QBrush(Qt.white), 3)
            pen.setCosmetic(True)
@@ -492,6 +501,9 @@ def display_contingency(self):
                X = X[:-1]
                X = numpy.array(X)
                Y = numpy.array(Y)
                if self.cumulative_distr:
                    dx = X[1] - X[0]
                    Y = numpy.cumsum(Y) * dx
                curvesline.append((X, Y))

            for t in ["fill", "line"]:
@@ -634,6 +646,9 @@ def _on_groupvar_idx_changed(self):
    def _on_set_smoothing(self):
        self._setup()

    def _on_cumulative_distr_changed(self):
        self._setup()

    def onDeleteWidget(self):
        self.plot.clear()
        super().onDeleteWidget()