def format_xy_data(self, evt):
info = self.info
records = evt.data
nchannels = len(records)
npoints = len(records[0])
if nchannels < 2:
return
objects = []
# points = zip(records[0], records[1])
points = numpy.zeros((len(records[0]), 2), numpy.float32)
points[:, 0] = records[0]
points[:, 1] = records[1]
self.SetXUseScopeTicks(False)
m = info.get_marker()
if m == 'line':
objects.append(plot.PolyLine(points, colour=self.channel_color(0)))
else:
objects.append(
plot.PolyMarker(points, marker=m,
colour=self.channel_color(0)))
graphics = plot.PlotGraphics(objects,
title=self.info.title,
xLabel='I',
yLabel='Q')
self.Draw(graphics, xAxis=self.x_range, yAxis=self.y_range)
self.update_y_range()
self.update_x_range()
def format_data (self, evt):
if not self.info.running:
return
if self.info.xy:
self.format_xy_data (evt)
return
info = self.info
records = evt.data
nchannels = len (records)
npoints = len (records[0])
objects = []
Ts = 1.0 / (info.get_sample_rate () / info.get_decimation_rate ())
x_vals = Ts * numpy.arange (-npoints/2, npoints/2)
# preliminary clipping based on time axis here, instead of in graphics code
time_per_window = self.info.get_time_per_div () * 10
n = int (time_per_window / Ts + 0.5)
n = n & ~0x1 # make even
n = max (2, min (n, npoints))
self.SetXUseScopeTicks (True) # use 10 divisions, no labels
for ch in range(nchannels):
r = records[ch]
# plot middle n points of record
lb = npoints/2 - n/2
ub = npoints/2 + n/2
# points = zip (x_vals[lb:ub], r[lb:ub])
points = numpy.zeros ((ub-lb, 2), numpy.float64)
points[:,0] = x_vals[lb:ub]
points[:,1] = r[lb:ub]
m = info.get_marker ()
if m == 'line':
objects.append (plot.PolyLine (points,
colour=self.channel_color (ch),
legend=('Ch%d' % (ch+1,))))
else:
objects.append (plot.PolyMarker (points,
marker=m,
colour=self.channel_color (ch),
legend=('Ch%d' % (ch+1,))))
graphics = plot.PlotGraphics (objects,
title=self.info.title,
xLabel = '', yLabel = '')
time_per_div = info.get_time_per_div ()
x_range = (-5.0 * time_per_div, 5.0 * time_per_div) # ranges are tuples!
volts_per_div = info.get_volts_per_div ()
if not self.info.autorange:
self.y_range = (-4.0 * volts_per_div, 4.0 * volts_per_div)
self.Draw (graphics, xAxis=x_range, yAxis=self.y_range)
self.update_y_range () # autorange to self.y_range