iPython Notebook, Static Interact; What am I missing?

Question

Recently I found this post on Interactive Widgets.

I am trying to implement this in some simple code, which iterates the logistic equation, and plots the consequent timeseries:

%matplotlib inline
import numpy as np
import matplotlib.pyplot as plt
import pylab
from IPython.html.widgets import interact

plt.close('all')

def logiter(r, x0, t):
    y = []
    x = x0
    for i in range(t):
        x = r*x*(1-x)
        y.append(x)

    fig, plt.plot(y)
    return fig

Then import the relevant packages:

from ipywidgets import StaticInteract, RangeWidget, RadioWidget

StaticInteract(logiter,
               r=RadioWidget([1, 2, 4]),
               t=RangeWidget(1, 10, 1),
               x0=RadioWidget([0.1, 0.3, 0.7]))

But, Alas, the output is a mess. It seems to be plotting all possible combinations of r,t and x0 instead of just one.

Can anyone tell me what I'm doing wrong?

best, T

one thing your code is missing: from ipywidgets import StaticInteract, RangeWidget, RadioWidget — den.run.ai
– den.run.ai, Commented Mar 17, 2015 at 22:26
it looks like your problem is pylab, it is not recommended way — den.run.ai
– den.run.ai, Commented Mar 18, 2015 at 15:35
Um. I don't really get what the problem is? This guy link has lots of working examples. I am struggling to understand the fundamental difference? — tmo
– tmo, Commented Mar 18, 2015 at 15:38
I added working example below, return fig is what was missing — den.run.ai
– den.run.ai, Commented Mar 18, 2015 at 15:46

den.run.ai · Accepted Answer · 2015-03-18 15:45:31Z

2

%matplotlib inline
import numpy as np
import matplotlib.pyplot as plt
#from IPython.html.widgets import interact

#plt.close('all')

def logiter(r, x0, t):
    y = []
    x = x0
    fig=plt.figure()
    for i in range(t):
        x = r*x*(1-x)
        y.append(x)

    plt.plot(y)
    return fig
from ipywidgets import StaticInteract, RangeWidget, RadioWidget

StaticInteract(logiter,
               r=RadioWidget([1, 2, 4]),
               t=RangeWidget(1, 10, 1),
               x0=RadioWidget([0.1, 0.3, 0.7]))

answered Mar 18, 2015 at 15:45

den.run.ai

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4 Comments

tmo Over a year ago

Great! I knew i had missed something simple.

den.run.ai Over a year ago

before you were plotting every time to the same plot, plt.figure() fixes this

Dave X Over a year ago

ipywidgets.__version__==1.4.0 no longer has StaticInteract, RangeWigdet, and RadioWidget. The replacement ipywidgets.IntSlider() and ipywidgets.RadioButton() don't appear to map well.

den.run.ai Over a year ago

This is different ipywidget, search for static ipywidget

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