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Which of the following is the correct syntax to convert a 2D NumPy array arr into a 1D array using ravel()?

easy📝 Syntax Q12 of 15
NumPy - Array Manipulation
Which of the following is the correct syntax to convert a 2D NumPy array arr into a 1D array using ravel()?
A<code>arr.flatten()</code>
B<code>ravel(arr)</code>
C<code>arr.ravel()</code>
D<code>arr.ravel</code>
Step-by-Step Solution
Solution:

  1. Step 1: Recall method usage

    ravel() is a method of a NumPy array, so it is called as arr.ravel().

  2. Step 2: Check other options

    ravel(arr) is incorrect because ravel is not a standalone function in NumPy; arr.flatten() is valid but uses flatten, not ravel; arr.ravel misses parentheses, so it returns a method object, not the result.

  3. Final Answer:

    arr.ravel() -> Option C

  4. Quick Check:

    Method call syntax = arr.ravel() [OK]
Quick Trick: Use parentheses to call methods like ravel() [OK]
Common Mistakes:
  • Forgetting parentheses when calling methods
  • Using ravel as a standalone function
  • Confusing flatten() with ravel() syntax

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