On 4/16/07, marco cammarata <[EMAIL PROTECTED]> wrote:
> Dear matplotlib users,
>
> I have the following problem,
>
> I need to plot an array of data as function of a parameter.
> The example below will clarify what I mean.
> The problem is that I don't know how to update the plot
>
> # (this x,y are to simulate my actual data)
> x=arange(100)
> y=x**2
>
> xc=50
> xc_gt_0=where( (x>xc), x-xc, float('nan'))
> pylab.plot(xc_gt_0,y)
> pylab.show()
>
> Now I want to see the same plot after having changed the value of xc
> from the shell.
>
> Any idea ?
> I was thinking to something like this
>
> while (reply =! "exit"):
> xc=raw_input("Inser the new value")
> draw()
>
> but it doesn't work
Save the output of the plot command as a line instance
>>> line, = pylab.plot(something)
Then later update your xdata
>>> xc = some_updated_data
Then set the xdata (or ydata or both) of the line instance
>>> line.set_xdata(xc)
Then redraw your plot
>>> pylab.draw()
That's it!
JDH
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