Hi all, great library!
Im trying to get this to plot a linegraph smoothly, based on an external
device, i expect to see the graph smoothly update 3-4 times per second.
If i edit the example's setData: loop and change the delay to 0.2 it
still only updates about once per second or so.
I've added a "print 'tick'" i can see that this occurs every 200ms to
STDOUT however the graph is still very slow to update?
ideas?
cheers
leigh
#!/usr/bin/env python
import time
import numpy
import veusz.embed as veusz
# construct a Veusz embedded window
# many of these can be opened at any time
g = veusz.Embedded('window title')
g.EnableToolbar()
# construct the plot
g.To( g.Add('page') )
g.To( g.Add('graph') )
g.Add('xy', marker='tiehorz', MarkerFill__color='green')
# this stops intelligent axis extending
#g.Set('x/autoExtend', False)
#g.Set('x/autoExtendZero', False)
# zoom out
g.Zoom(0.8)
# loop, changing the values of the x and y datasets
for i in range(100000):
x = numpy.arange(0+i/2., 7.+i/2., 0.05)
y = numpy.sin(x)
g.SetData('x', x)
g.SetData('y', y)
print "tick "
# wait to animate the graph
time.sleep(0.2)
# close the window (this is not strictly necessary)
g.Close()
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