Bright Tutorials Bright Tutorials
CBSE Class 12 Informatics Practices Question 120 of 147

Plotting with Pyplot — Question 3

Back to all questions
3
Question

Question 1(c)

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

X = np.arange(1, 18, 2.655)
B = np.log(X)
plt.scatter(X, Y)

Will this code produce error ? Why/Why not ?

Answer

The code will produce an error because the variable Y is not defined.

The corrected code is:

X = np.arange(1, 18, 2.655)
B = np.log(X)
plt.scatter(X, B)
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 X = np.arange(1, 18, 2.655) creates an array X using NumPy's arange() function. It starts from 1, increments by 2.655, and generates values less than 18. The resulting array will look like [1., 3.655, 6.31, 8.965, 11.62, 14.275, 16.93]. Next, the line B = np.log(X) calculates the natural logarithm of each element in array X using NumPy's log() function. Finally, the line plt.scatter(X, Y) attempts to use Matplotlib's scatter() function to create a scatter plot. However, Y is not defined in code, leading to a NameError.