def _update_color(self):
if self.plotdata is None:
return
colorvar = self._color_var()
validmask = self.plotdata.validmask
selectionmask = self.plotdata.selectionmask
if colorvar is not None:
colors = plotutils.color_data(self.data, colorvar)[validmask]
else:
colors = numpy.array([[192, 192, 192]])
colors = numpy.tile(colors, (self.plotdata.X.shape[0], 1))
selectedmask = selectionmask[validmask]
pointstyle = numpy.where(
selectedmask, plotutils.Selected, plotutils.NoFlags)
pendata = plotutils.pen_data(colors * 0.8, pointstyle)
colors = numpy.hstack(
[colors, numpy.full((colors.shape[0], 1), float(self.opacity))])
brushdata = plotutils.brush_data(colors, )
if self.plotdata.subsetmask is not None:
subsetmask = self.plotdata.subsetmask[validmask]
brushdata[~subsetmask] = QtGui.QBrush(Qt.NoBrush)
self.plotdata.pendata = pendata
self.plotdata.brushdata = brushdata
self.plotdata.mainitem.setPen(pendata)
self.plotdata.mainitem.setBrush(brushdata)
self._update_legend()
def _update_color(self):
if self.plotdata is None:
return
colorvar = self._color_var()
validmask = self.plotdata.validmask
selectionmask = self.plotdata.selectionmask
if colorvar is not None:
colors = plotutils.color_data(self.data, colorvar)[validmask]
else:
colors = numpy.array([[192, 192, 192]])
colors = numpy.tile(colors, (self.plotdata.X.shape[0], 1))
selectedmask = selectionmask[validmask]
pointstyle = numpy.where(
selectedmask, plotutils.Selected, plotutils.NoFlags)
pendata = plotutils.pen_data(colors * 0.8, pointstyle)
colors = numpy.hstack(
[colors, numpy.full((colors.shape[0], 1), float(self.opacity))])
brushdata = plotutils.brush_data(colors)
self.plotdata.pendata = pendata
self.plotdata.brushdata = brushdata
self.plotdata.mainitem.setPen(pendata)
self.plotdata.mainitem.setBrush(brushdata)
self._update_legend()
def _update_density(self):
if self.plotdata is None:
return
if self.plotdata.densityimage is not None:
self.plot.removeItem(self.plotdata.densityimage)
self.plotdata.densityimage = None
if self.data.domain.has_discrete_class and self.class_density:
coords = self.plotdata.embedding_coords
radius = numpy.linalg.norm(coords, axis=1).max()
coords = coords / radius
xmin = ymin = -1.05
xmax = ymax = 1.05
xdata, ydata = coords.T
colors = plotutils.color_data(self.data, self.data.domain.class_var)[self.plotdata.validmask]
imgitem = classdensity.class_density_image(xmin, xmax, ymin, ymax, 256, xdata, ydata, colors)
self.plot.addItem(imgitem)
self.plotdata.densityimage = imgitem
def _update_density(self):
if self.plotdata is None:
return
if self.plotdata.densityimage is not None:
self.plot.removeItem(self.plotdata.densityimage)
self.plotdata.densityimage = None
if self.data.domain.has_discrete_class and self.class_density:
coords = self.plotdata.embedding_coords
radius = numpy.linalg.norm(coords, axis=1).max()
coords = coords / radius
xmin = ymin = -1.05
xmax = ymax = 1.05
xdata, ydata = coords.T
colors = plotutils.color_data(
self.data, self.data.domain.class_var)[self.plotdata.validmask]
imgitem = classdensity.class_density_image(
xmin, xmax, ymin, ymax, 256, xdata, ydata, colors)
self.plot.addItem(imgitem)
self.plotdata.densityimage = imgitem
def _setup(self):
"""
Setup the plot.
"""
X = self.data.X
Y = self.data.Y
mask = numpy.bitwise_or.reduce(numpy.isnan(X), axis=1)
mask |= numpy.isnan(Y)
valid = ~mask
X = X[valid, :]
Y = Y[valid]
if self.data.domain.class_var.is_discrete:
Y = Y.astype(int)
X = (X - numpy.mean(X, axis=0))
span = numpy.ptp(X, axis=0)
X[:, span > 0] /= span[span > 0].reshape(1, -1)
if self.initialization == OWFreeViz.Circular:
anchors = linproj.linproj.defaultaxes(X.shape[1]).T
else:
anchors = numpy.random.random((X.shape[1], 2)) * 2 - 1
EX = numpy.dot(X, anchors)
radius = numpy.max(numpy.linalg.norm(EX, axis=1))
jittervec = numpy.random.RandomState(4).rand(*EX.shape) * 2 - 1
jittervec *= 0.01
_, jitterfactor = self.JitterAmount[self.jitter]
colorvar = self._color_var()
shapevar = self._shape_var()
sizevar = self._size_var()
labelvar = self._label_var()
if colorvar is not None:
colors = plotutils.color_data(self.data, colorvar)[valid]
else:
colors = numpy.array([[192, 192, 192]])
colors = numpy.tile(colors, (X.shape[0], 1))
pendata = plotutils.pen_data(colors * 0.8)
colors = numpy.hstack(
[colors, numpy.full((colors.shape[0], 1), float(self.opacity))])
brushdata = plotutils.brush_data(colors)
shapedata = plotutils.shape_data(self.data, shapevar)[valid]
sizedata = size_data(
self.data, sizevar, pointsize=self.point_size)[valid]
if labelvar is not None:
labeldata = plotutils.column_data(self.data, labelvar, valid)
labeldata = [labelvar.str_val(val) for val in labeldata]
else:
labeldata = None
coords = (EX / radius) + jittervec * jitterfactor
item = linproj.ScatterPlotItem(
x=coords[:, 0],
y=coords[:, 1],
brush=brushdata,
pen=pendata,
symbols=shapedata,
size=sizedata,
data=numpy.flatnonzero(valid),
antialias=True,
)
self.plot.addItem(item)
self.plot.setRange(QtCore.QRectF(-1.05, -1.05, 2.1, 2.1))
# minimum visible anchor radius
minradius = self.min_anchor_radius / 100 + 1e-5
axisitems = []
for anchor, var in zip(anchors, self.data.domain.attributes):
axitem = AxisItem(
line=QtCore.QLineF(0, 0, *anchor), label=var.name,)
axitem.setVisible(numpy.linalg.norm(anchor) > minradius)
axitem.setPen(pg.mkPen((100, 100, 100)))
axitem.setArrowVisible(False)
self.plot.addItem(axitem)
axisitems.append(axitem)
hidecircle = QtGui.QGraphicsEllipseItem()
hidecircle.setRect(
QtCore.QRectF(-minradius, -minradius,
2 * minradius, 2 * minradius))
_pen = QtGui.QPen(Qt.lightGray, 1)
_pen.setCosmetic(True)
hidecircle.setPen(_pen)
self.plot.addItem(hidecircle)
self.plotdata = namespace(
validmask=valid,
embedding_coords=EX,
jittervec=jittervec,
anchors=anchors,
mainitem=item,
axisitems=axisitems,
hidecircle=hidecircle,
basecolors=colors,
brushdata=brushdata,
pendata=pendata,
shapedata=shapedata,
sizedata=sizedata,
labeldata=labeldata,
labelitems=[],
densityimage=None,
X=X,
Y=Y,
selectionmask=numpy.zeros_like(valid, dtype=bool),
subsetmask=None
)
self._update_legend()
self._update_labels()
self._update_density()
def _setup(self):
"""
Setup the plot.
"""
X = self.data.X
Y = self.data.Y
mask = numpy.bitwise_or.reduce(numpy.isnan(X), axis=1)
mask |= numpy.isnan(Y)
valid = ~mask
X = X[valid, :]
Y = Y[valid]
if self.data.domain.class_var.is_discrete:
Y = Y.astype(int)
X = (X - numpy.mean(X, axis=0))
span = numpy.ptp(X, axis=0)
X[:, span > 0] /= span[span > 0].reshape(1, -1)
if self.initialization == OWFreeViz.Circular:
anchors = linproj.linproj.defaultaxes(X.shape[1]).T
else:
anchors = numpy.random.random((X.shape[1], 2)) * 2 - 1
EX = numpy.dot(X, anchors)
radius = numpy.max(numpy.linalg.norm(EX, axis=1))
jittervec = numpy.random.RandomState(4).rand(*EX.shape) * 2 - 1
jittervec *= 0.01
_, jitterfactor = self.JitterAmount[self.jitter]
colorvar = self._color_var()
shapevar = self._shape_var()
sizevar = self._size_var()
labelvar = self._label_var()
if colorvar is not None:
colors = plotutils.color_data(self.data, colorvar)[valid]
else:
colors = numpy.array([[192, 192, 192]])
colors = numpy.tile(colors, (X.shape[0], 1))
pendata = plotutils.pen_data(colors * 0.8)
colors = numpy.hstack(
[colors, numpy.full((colors.shape[0], 1), float(self.opacity))])
brushdata = plotutils.brush_data(colors)
shapedata = plotutils.shape_data(self.data, shapevar)[valid]
sizedata = size_data(
self.data, sizevar, pointsize=self.point_size)[valid]
if labelvar is not None:
labeldata = plotutils.column_data(self.data, labelvar, valid)
labeldata = [labelvar.str_val(val) for val in labeldata]
else:
labeldata = None
coords = (EX / radius) + jittervec * jitterfactor
item = linproj.ScatterPlotItem(
x=coords[:, 0],
y=coords[:, 1],
brush=brushdata,
pen=pendata,
symbols=shapedata,
size=sizedata,
data=numpy.flatnonzero(valid),
antialias=True,
)
self.plot.addItem(item)
self.plot.setRange(QtCore.QRectF(-1.05, -1.05, 2.1, 2.1))
# minimum visible anchor radius
minradius = self.min_anchor_radius / 100 + 1e-5
axisitems = []
for anchor, var in zip(anchors, self.data.domain.attributes):
axitem = AxisItem(
line=QtCore.QLineF(0, 0, *anchor), label=var.name,)
axitem.setVisible(numpy.linalg.norm(anchor) > minradius)
axitem.setPen(pg.mkPen((100, 100, 100)))
axitem.setArrowVisible(False)
self.plot.addItem(axitem)
axisitems.append(axitem)
hidecircle = QtGui.QGraphicsEllipseItem()
hidecircle.setRect(
QtCore.QRectF(-minradius, -minradius,
2 * minradius, 2 * minradius))
_pen = QtGui.QPen(Qt.lightGray, 1)
_pen.setCosmetic(True)
hidecircle.setPen(_pen)
self.plot.addItem(hidecircle)
self.plotdata = namespace(
validmask=valid,
embedding_coords=EX,
jittervec=jittervec,
anchors=anchors,
mainitem=item,
axisitems=axisitems,
hidecircle=hidecircle,
basecolors=colors,
brushdata=brushdata,
pendata=pendata,
shapedata=shapedata,
sizedata=sizedata,
labeldata=labeldata,
labelitems=[],
densityimage=None,
X=X,
Y=Y,
selectionmask=numpy.zeros_like(valid, dtype=bool)
)
self._update_legend()
self._update_labels()
self._update_density()