Hi
the following code snippet is from a simple wxpython/matplotlib app
# Data object class
class PlotData(object):
# Constructor (dummy arrays)
def __init__(self):
self.np = 100
self.xa = numpy.arange(100.0)
self.ya = 2.0 * self.xa
self.ys = 4.0 * self.xa
# Plot window class
class PlotWin(object):
def __init__(self, data):
self.data = data # Store reference to data object
self.figure = Figure() # Initialise figure
# Create an Axes object to plot on
self.ax1 = self.figure.gca()
self.ax1.yaxis.tick_left()
self.ax1.xaxis.tick_bottom()
# Plot the data
self.lines=[]
self.lines.append(self.ax1.plot(self.data.xa, self.data.ya, 'g'))
self.lines.append(self.ax1.plot(self.data.xa, self.data.ys, '-r'))
# Update plot with new data
def RefreshPlot(self, data):
self.lines[0].set_data((self.data.xa,self.data.ya))
self.lines[1].set_data((self.data.xa,self.data.ys))
self.canvas.draw()
# Main program
if __name__ == "__main__":
data = PlotData()
pwin = PlotWin(data)
pwin.RefreshPlot(data)
The plot data changes during the application and I just want to
replace the existing data with the new data (which may have a
different number of points compared to the old data). I get the
Python error "'list' object has no attribute 'set_data'" when the
code executes RefreshPlot(). AFAIK lines[0] and lines[1] are
'Line2D' objects (at least that's what Python says they are when I
ask to have them printed) , which do have a 'set_data' method. I'm
sure there's something really easy that I need to do but just can't
see it - all suggestions gratefully received!
Thanks in advance
Alun Griffiths
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