Hello Hussein,
maybe the following example helps you. It uses the module 'time' to wait for
some seconds.
regards Matthias
--------------- "test.dat": ----------------------------------------------
#time x_coordinate y_coordinate
0.1 1 1
0.2 2 2
0.3 3 3
0.4 4 4
-------------------- "... .py":
--------------------------------------------------
from scipy.io import read_array
import pylab as pl
import numpy as npy
import time
data = read_array("test.dat")
pl.ion() # Turn interactive mode on.
pl.figure()
pl.subplot(111, autoscale_on=False)
pl.axis([0.0, 5.0, 0.0, 5.0])
# plot the first point:
point, = pl.plot([data[0, 1]], [data[0, 2]], 'b+')
pl.draw()
print "first (x, y) = ", data[0, 1:]
for i in xrange(1, npy.shape(data)[0]):
# wait time-difference * 10 seconds
time.sleep((data[i, 0]-data[i-1, 0])*10)
# reset data of plotted point
point.set_data(npy.array([data[i, 1]]), npy.array([data[i, 2]]))
pl.draw()
pl.draw()
print "new (x, y) = ", data[i, 1:]
pl.ioff() # Turn interactive mode off.
pl.show()
-------------------------------------------------------------------------------------------
On Sunday 20 July 2008 21:31:42 hussein alshatri wrote:
> Hi all,
>
> I am new with matplotlib. I want to use matplotlib/animation.
>
> I want to plot a moving point. The information comes from input file that
> include columens as bellow:
>
> #time x_coordinate y_coordinate
>
> I have seen the examples on the website, But I don't know how to configure
> the time.
>
> Could anyone just guide me how to do this or if there is a short example it
> would be great...
>
> Thank you in advanced.
>
> Hussein
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