I seem to have fixed my initial problem - rf. attached .ipynb.  

Next question - how do I avoid continuous update when a slider is moved? 

thanks, Randy


On Monday, February 19, 2018 at 11:13:02 AM UTC-5, Randy Heiland wrote:
>
> Hello,
>
> I was testing the following on https://try.jupyter.org/  and wondering 
> why the plot sometimes disappears:
>
> %matplotlib notebook
> import numpy as np
> import matplotlib.pyplot as plt
>
> def f(p):
>     plt.figure(2)
>     nx = 10
>     ny = 10
>     x = np.linspace(1, nx, nx)
>     y = np.linspace(1, ny, ny)
>     xv, yv = np.meshgrid(x, y)
>
>     rgb = np.zeros((nx*ny,3))
>     rgb[:,0] += 1
>     rgb[:][p-1] = [0,1,0]
>
>     area=200
>     plt.scatter(xv, yv, marker='s', s=area, c=rgb)
>
>     plt.xticks([])
>     plt.yticks([])
> #    plt.show()
>
> from ipywidgets import interact, interactive
> interactive_plot = interactive(f, p=(0, 100))
> interactive_plot
>

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Attachment: mockup3.ipynb
Description: Binary data

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