2D FFT (fft2) in SciPy - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the 2D FFT function from scipy.

SciPy

from scipy.fft import [1]

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

Afft2

Bfft

Cifft

Drfft

Attempts:

3 left

💡 Hint

Common Mistakes

Importing the 1D FFT function 'fft' instead of 'fft2'.

Using inverse FFT functions like 'ifft' by mistake.

The fft2 function computes the 2-dimensional Fast Fourier Transform.

2fill in blank

medium

Complete the code to apply 2D FFT on the array 'data'.

SciPy

result = [1](data)

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

Afft2

Bfft

Cifft2

Drfft2

Attempts:

3 left

💡 Hint

Common Mistakes

Using 1D FFT 'fft' instead of 'fft2'.

Using inverse FFT 'ifft2' by mistake.

The fft2 function computes the 2D FFT of the input array.

3fill in blank

hard

Fix the error in the code to correctly import fft2 from scipy.fft.

SciPy

from scipy.fft import [1]
result = [1](matrix)

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

Afft

Bifft

Crfft

Dfft2

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'fft' instead of 'fft2'.

Using inverse or real FFT functions.

Using fft2 from scipy.fft correctly calls the 2D FFT function from the scipy.fft module.

4fill in blank

hard

Fill both blanks to create a dictionary comprehension that maps each 2D array to its 2D FFT.

SciPy

fft_results = {name: [1](array) for name, array in data_dict.items() if array.ndim == [2]

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Afft2

Bfft

C2

D1

Attempts:

3 left

💡 Hint

Common Mistakes

Using 1D FFT function 'fft' instead of 'fft2'.

Checking for 1D arrays instead of 2D.

The comprehension applies fft2 only to arrays with 2 dimensions (ndim == 2).

5fill in blank

hard

Fill all three blanks to create a dictionary of 2D FFT magnitudes for arrays with shape larger than 3x3.

SciPy

fft_magnitudes = {name: abs([1](array)) for name, array in dataset.items() if array.shape[0] > [2] and array.shape[1] > [3]

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

Afft

B3

Dfft2

Attempts:

3 left

💡 Hint

Common Mistakes

Using 1D FFT 'fft' instead of 'fft2'.

Checking wrong shape dimensions or using wrong comparison values.

The code applies fft2 to arrays larger than 3 rows and 3 columns, then takes the magnitude with abs.