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What will the following code output?

medium📝 Predict Output Q13 of 15
Matplotlib - 3D Plotting
What will the following code output?
import matplotlib.pyplot as plt
from mpl_toolkits.mplot3d import Axes3D
import numpy as np

fig = plt.figure()
ax = fig.add_subplot(111, projection='3d')
x = np.linspace(0, 1, 5)
y = np.linspace(0, 1, 5)
z = x + y
ax.scatter(x, y, z)
plt.show()
AA 2D scatter plot ignoring z values
BA 3D scatter plot showing points where z = x + y
CSyntaxError due to missing import
DRuntimeError because z is not defined correctly
Step-by-Step Solution
Solution:
  1. Step 1: Analyze the code setup

    The code imports necessary modules, creates a 3D subplot, and defines x, y arrays with 5 points each.
  2. Step 2: Understand the plotting command

    It calculates z as x + y element-wise and plots a 3D scatter plot with these points.
  3. Final Answer:

    A 3D scatter plot showing points where z = x + y -> Option B
  4. Quick Check:

    3D scatter with z = x + y = A [OK]
Quick Trick: Check projection='3d' and scatter usage for 3D plots [OK]
Common Mistakes:
  • Thinking it produces 2D plot ignoring z
  • Expecting syntax or runtime errors
  • Confusing z calculation with undefined variable

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