NumPy - Aggregation Functions
Which of the following is the correct syntax to compute the cumulative sum of a numpy array
arr?Which of the following is the correct syntax to compute the cumulative sum of a numpy array arr?
easy📝 Conceptual Q12 of 15
Step-by-Step Solution
Solution:
Step 1: Check numpy function usage
np.cumsum(arr)is the basic syntax to get cumulative sum of all elements in the array.Step 2: Check array method and axis parameter
arr.cumsum()is a valid method call on numpy arrays. Also,np.cumsum(arr, axis=0)computes cumulative sum along the first axis, valid for multi-dimensional arrays.Final Answer:
np.cumsum(arr) -> Option AQuick Check:
Basic syntax is np.cumsum(arr) [OK]
Quick Trick: np and array method both work; axis optional [OK]
Common Mistakes:
- Thinking only np.cumsum(arr) works
- Ignoring axis parameter for multi-dimensional arrays
- Assuming cumsum is not an array method
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