"Lawson Hanson" <[EMAIL PROTECTED]> a écrit dans le message de news: [EMAIL PROTECTED] > Nicholas Bastin wrote: >> On 10/4/07, Jean-Francois Canac <[EMAIL PROTECTED]> wrote: >>> [EMAIL PROTECTED] >>>> I would draw dots on a suitably sized Tkinter canvas, after drawing a >>>> schematic >>>> of the race track (laborious). >>>> >>>> 20 per second will be no problem, provided the machine is half decent. >>>> >>>> What is the speed at which the com port runs? >>>> >>>> - Hendrik >>>> >>> The com port run at 19.2 kb/s. >>> My pb is more the real time aspect: to see the plot changing in real >>> time >>> than the com aspect as the installation is already running with programs >>> in >>> c++. >>> The PC on which it is running is good enought >>> For me the interest is to migrate all taht on python to be able to make >>> fast >>> changes when it is of interest >> >> The success of this will have more to do with design than programming >> language. Any GUI toolkit which allows partial screen updates can be >> made to update at least as fast as your screen refresh rate, even in >> python. >> >> -- >> Nick > > If you are using Tkinter (probably a very good choice), just remember > to make periodic (i.e., once per I/O processing loop) calls to: > > Tkinter.update_idletasks() > > which will update the display window, etc. > > Regards, > > Lawson > Finally I tried this coding and it works #========================== import time import pylab
pylab.ion() lat,long,vit = pylab.load(r"c:\pytst\test1.txt",usecols=(1,2,3), unpack=True) lat_min=pylab.amin(lat) lat_max=pylab.amax(lat) long_min=pylab.amin(long) long_max=pylab.amax(long) print "start" timefig = pylab.figure(1) timesub = pylab.subplot(111) x=[] y=[] lines = pylab.plot(x,y) print lat_min,lat_max,long_min,long_max for i in range(len(lat)): x.append(long[i]) y.append(lat[i]) lines[0].set_data(x,y) timesub.set_xlim(long_min,long_max) timesub.set_ylim(lat_min,lat_max) pylab.draw() #================ The kind of data I have in the text file are just below Now I have two problems, I think my coding is not very clean as when I try yo close or manipulate the windows it generates an error secondly I think it is a bit slow. I would much prefer something quicker and to be able to adapt the speed dynamically with a sleep instruction or something as that 09:25:08.50 46.863930 3.161866 56.9 Km/h 09:45:07.75 46.863907 3.161786 11.5 Km/h 09:45:08.0 46.863914 3.161794 12.4 Km/h 09:45:08.25 46.863918 3.161804 13.4 Km/h 09:45:08.50 46.863922 3.161814 14.5 Km/h 09:45:08.75 46.863930 3.161825 15.4 Km/h 09:45:09.0 46.863934 3.161837 16.1 Km/h 09:45:09.25 46.863941 3.161848 16.6 Km/h 09:45:09.50 46.863945 3.161861 17.1 Km/h 09:45:09.75 46.863953 3.161874 17.3 Km/h
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