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CBSE Class 12 Informatics Practices Question 119 of 147

Plotting with Pyplot — Question 2

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2
Question

Question 1(b)

Execute the following codes and find out what happens ? (Libraries have been imported already ; plt is the alias name for matplotlib.pyplot)

A = np.arange(2, 20, 2)
B = np.log(A)
plt.bar(A, B)

Will this code produce error ? Why/Why not ?

Answer

Executing the provided code will not produce an error. However, the resulting plot might not be as expected because the x-axis values are discrete and categorical, not continuous.

Output
Execute the following codes and find out what happens ? Will this code produce error ? Why/Why not ? Plotting with Pyplot, Informatics Practices Computer Science Sumita Arora Solutions CBSE Class 12
Explanation

The line A = np.arange(2, 20, 2) creates an array A using NumPy's arange() function. It starts from 2, increments by 2, and includes values up to 20. This results in the array [2, 4, 6, 8, 10, 12, 14, 16, 18]. Next, the line B = np.log(A) calculates the natural logarithm of each element in array A using NumPy's log() function and stores the results in array B. Finally, plt.bar(A, B) creates a bar plot using Matplotlib's bar() function. It plots the values in array A along the x-axis and the corresponding values in array B along the y-axis.