Interactive animation with widgets in Matplotlib - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the widget module needed for interactive sliders.

Matplotlib

from matplotlib import pyplot as plt
from matplotlib import animation
from matplotlib.widgets import [1]

Drag options to blanks, or click blank then click option'

ASlider

BButton

CCheckButtons

DRadioButtons

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing Button instead of Slider because both are widgets.

Using RadioButtons which are for selection, not sliding.

The Slider widget from matplotlib.widgets is used to create interactive sliders for animations.

2fill in blank

medium

Complete the code to create a figure and axis for plotting.

Matplotlib

fig, ax = plt.[1]()

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Aplot

Bshow

Cfigure

Dsubplots

Attempts:

3 left

💡 Hint

Common Mistakes

Using plt.figure() which returns only the figure, not axes.

Using plt.plot() which creates a plot but not figure and axes objects.

plt.subplots() creates a figure and a set of subplots (axes) for plotting.

3fill in blank

hard

Fix the error in the animation function to update the line data.

Matplotlib

def update(frame):
    y = [i * frame for i in range(10)]
    line.set_[1](y)
    return line,

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Aupdate_data

Bset_data

Cset_ydata

Dset_xdata

Attempts:

3 left

💡 Hint

Common Mistakes

Using set_data which requires both x and y data.

Using set_xdata which updates x-values, not y-values.

The set_ydata method updates the y-values of the line for animation.

4fill in blank

hard

Fill both blanks to create a Slider widget and set its position on the figure.

Matplotlib

ax_slider = plt.axes([[1], 0.05, 0.65, 0.03])
slider = Slider(ax_slider, '[2]', 0, 10, valinit=5)

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A0.1

B0.2

CFrequency

DAmplitude

Attempts:

3 left

💡 Hint

Common Mistakes

Using 0.2 for position which shifts slider too far right.

Labeling slider as 'Amplitude' when controlling frequency.

The slider position starts at 0.1 on the x-axis and is labeled 'Frequency' for controlling frequency.

5fill in blank

hard

Fill all three blanks to update the animation frame using slider value and redraw the line.

Matplotlib

def update(val):
    freq = slider.val
    y = [[1] * freq for [2] in range(10)]
    line.set_[3](y)
    fig.canvas.draw_idle()

Drag options to blanks, or click blank then click option'

Ai

Bi * 2

Cset_ydata

Dset_data

Attempts:

3 left

💡 Hint

Common Mistakes

Using set_data which requires both x and y data.

Using i * 2 instead of i for the loop variable.

We multiply each i by freq to get y-values, use i as loop variable, and update y-data of the line.