uninvited comment: consider matplot lib, it's much better than gnuplot imo and I say this as one that enjoyed gnuplot ease and availability (free software) for quite some time, so no aspersions cast. But really, consider matplotlib, I bet you would not regret it.
cheers. On Thu, 2008-09-18 at 14:14 -0500, Philippe Garteiser, PhD wrote: > Brilliant ! Thanks that did it beautifully, my virtual kidney (renal > function simulator) is well on its way now ! > > > > -----Original Message----- > From: Guilherme Polo [mailto:[EMAIL PROTECTED] > Sent: Thu 9/18/2008 12:49 PM > To: Philippe Garteiser, PhD; tkinter-discuss@python.org > Subject: Re: [Tkinter-discuss] problem to update gnuplot display using > a Scale widget > > On Tue, Sep 16, 2008 at 7:19 PM, Philippe Garteiser, PhD > <[EMAIL PROTECTED]> wrote: > > Hello! > > I am using a Tkinter GUI to operate a C binary whose input is a > float number > > gotten from a Scale widget, and whose output is a datafile. I would > like to > > get gnuplot to replot the datafile each time it is overwritten (in > essence > > have the plot refreshed by the Scale slider). > > To do that, I pass the function "printer(self,newval)", to the > Scale's > > command. In the printer function, I use os.system to execute the > binary, and > > I operate gnuplot as a special file opened by os.popen, to which I > write > > with the chevrons print statement. > > > > import os,Tkinter,string,time > > class MyApp: > > def __init__(self, parent): > > self.f=os.popen("gnuplot -","w") > > print >>self.f,"plot \"data.dat\" with lines" > > print >>self.f,"reread" > > self.myParent=parent > > self.myContainer1=Frame(parent) > > self.myContainer1.pack() > > self.v=DoubleVar() > > > > > self.slider1=Scale(self.myParent,from_=0,to=1,resolution=0.001,command=self.printer)#variable=self.v,command=self.printer) > > self.slider1.pack() > > > > def printer(self,newval): > > os.system("/bin/generate_data_file "+str(newval)) > > time.sleep(0.09) > > print >>self.f,"replot\n" > > return newval > > root=Tk() > > myapp=MyApp(root) > > root.mainloop() > > > > Unfortunately I don't obtain the expected result. The Tk window is > there > > with functioning slider, the generate_data_file is executed and > given the > > proper input value from the slider, but gnuplot is still a problem. > The > > gnuplot window only comes up when I close the Tkinter window, and > shuts down > > rapidly. > > Do you have any ideas as to what I need to fix ? > > You are forgetting to flush f. > Do a self.f.flush() after that "reread" and "replot". > > > Also, it would be great not > > to have to use the pyGnuplot.py package, as the program will have to > run on > > minimally installed boxes (i.e. standard python, no extra modules > allowed). > > > > Thanks a lot ! > > > > "It does not pay to leave a live > > dragon out of your calculations" > > - Tolkien > > > > > > _______________________________________________ > > Tkinter-discuss mailing list > > Tkinter-discuss@python.org > > http://mail.python.org/mailman/listinfo/tkinter-discuss > > > > > > > > -- > -- Guilherme H. Polo Goncalves > > > > > _______________________________________________ > Tkinter-discuss mailing list > Tkinter-discuss@python.org > http://mail.python.org/mailman/listinfo/tkinter-discuss
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