def test_NonUniformImage_colormap():
window = pg.GraphicsLayoutWidget()
viewbox = pg.ViewBox()
window.setCentralWidget(viewbox)
window.resize(200, 200)
window.show()
x = [1.0, 3.0, 10.0]
y = [1.0, 2.0, 4.0]
X, Y = np.meshgrid(x, y, indexing='ij')
Z = X * Y
Z[:, 0] = [np.NINF, np.NAN, np.PINF]
image = NonUniformImage(x, y, Z, border=fn.mkPen('g'))
cmap = ColorMap(pos=[0.0, 1.0],
color=[(0.0, 0.0, 0.0, 1.0), (1.0, 1.0, 1.0, 1.0)])
image.setColorMap(cmap)
viewbox.addItem(image)
QtTest.QTest.qWaitForWindowExposed(window)
QtTest.QTest.qWait(100)
assertImageApproved(window, 'nonuniform_image/colormap-3x3')
def test_NonUniformImage_lut():
window = pg.GraphicsLayoutWidget()
viewbox = pg.ViewBox()
window.setCentralWidget(viewbox)
window.resize(200, 200)
window.show()
x = [1.0, 3.0, 10.0]
y = [1.0, 2.0, 4.0]
X, Y = np.meshgrid(x, y, indexing='ij')
Z = X * Y
image = NonUniformImage(x, y, Z, border=fn.mkPen('g'))
viewbox.addItem(image)
lut = pg.HistogramLUTItem()
window.addItem(lut)
image.setLookupTable(lut, autoLevel=True)
h = image.getHistogram()
lut.plot.setData(*h)
QtTest.QTest.qWaitForWindowExposed(window)
QtTest.QTest.qWait(100)
assertImageApproved(window, 'nonuniform_image/lut-3x3')
def test_NonUniformImage_data_dimensions():
x = [1.0, 3.0, 10.0]
y = [1.0, 2.0, 4.0]
with pytest.raises(Exception) as ex:
NonUniformImage(x, y, x)
assert "The length of x and y must match the shape of z." in str(ex)
def test_NonUniformImage_scale_dimensions():
x = [1.0, 3.0, 10.0]
y = [1.0, 2.0, 4.0]
X, Y = np.meshgrid(x, y, indexing='ij')
Z = X * Y
for args in [(Z, y, Z), (x, Z, Z)]:
with pytest.raises(Exception) as ex:
NonUniformImage(*args)
assert "x and y must be 1-d arrays." in str(ex)
def test_NonUniformImage_scale_monotonicity():
x = [1.0, 0.0, 10.0]
y = [1.0, 2.0, 4.0]
X, Y = np.meshgrid(x, y, indexing='ij')
Z = X * Y
for args in [(x, y, Z), (y, x, Z)]:
with pytest.raises(Exception) as ex:
NonUniformImage(*args)
assert "The values in x and y must be monotonically increasing." in str(ex)
win.setCentralWidget(cw)
win.setWindowTitle('pyqtgraph example: Non-uniform Image')
p = cw.addPlot(title="Power Losses [W]", row=0, col=0)
lut = pg.HistogramLUTItem(orientation="horizontal")
p.setMouseEnabled(x=False, y=False)
cw.nextRow()
cw.addItem(lut)
# load the gradient
lut.gradient.loadPreset('gor')
image = NonUniformImage(w * RADS2RPM, tau, P_loss.T)
image.setLookupTable(lut, autoLevel=True)
image.setZValue(-1)
p.addItem(image)
h = image.getHistogram()
lut.plot.setData(*h)
p.showGrid(x=True, y=True)
p.setLabel(axis='bottom', text='Speed [rpm]')
p.setLabel(axis='left', text='Torque [Nm]')
# elevate the grid lines
p.axes['bottom']['item'].setZValue(1000)
p.axes['left']['item'].setZValue(1000)