How to set default values for IPython widgets?

Question

I am using IPython widgets to create an interactive plot that will help students understand the determinants of accuracy of various ODE solvers available in scipy.integrate.ode. However, I can't seem to find much in the way of documentation on the various types of widgets and their keyword args.

from IPython.html.widgets import *    

@interact(h=FloatTextWidget(), atol=FloatTextWidget(), rtol=FloatTextWidget(),
          k=IndexSliderWidget(), integrator=TextWidget()))
def plot_lotka_volterra_residuals(h=1e-1, atol=1e-3, rtol=1e-3, k=3, integrator='dopri5'):
    """Plots residuals of the Lotka-Volterra system."""
    # make a pretty plot!

In particular, I would like to know how to set a default value for each widget.

Ian · Accepted Answer · 2014-08-28 15:08:37Z

1

The declaration of the widgets takes a value keyword argument; you may be able to adapt examples such as this, or try Rossant's detailed Europy tutorial.

answered Aug 28, 2014 at 15:08

Ian

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papahabla · Accepted Answer · 2016-04-29 18:19:35Z

0

Using ipywidgets, an instance of a control class can be passed to interact.

from ipywidgets import interact, FloatSlider

def update(a):
    print a

interact(update, a=FloatSlider(min=1000., max=100000., step=1000, value=R10, description='Parameter A'))

The GitHub repo has many great examples.

answered Apr 29, 2016 at 18:19

papahabla

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1 Comment

vwvan Over a year ago

GitHub link is dead

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