I presume you're running that script in interactive shell?
Try draw() instead of show().

Regards,

-JJ


On Sun, Sep 6, 2009 at 3:06 PM, tva<t...@brygge.dk> wrote:
>
> Hi all
>
> with matplotlib 0.98.5.3 this script will draw new lines as the scrips is
> running:
>
> from pylab import *
> x = arange(0,2*pi,0.01)
> for i in arange(1,20):
>
>        y=sin(x+i)
>        plot(x,y)  # update the data
>        show()
>
>
> with matplotlib 0.99, the exact same script runs to the end without plotting
> and then plots all the lines. This is just a trivial example but for some
> applications it is useful to monitor the evolution of curves as the script
> is running - allows me to update parameters if something diverges.
> Any idea why there is such a difference between 0.98.5.3 and 0.99 ??
> --
> View this message in context: 
> http://www.nabble.com/cannot-plot-in-loops-with-matplotlib-0.99.-0.98-works-fine-tp25320454p25320454.html
> Sent from the matplotlib - users mailing list archive at Nabble.com.
>
>
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