π‘ NumPy Tip: Efficient Filtering with Boolean Masks
Avoid slow Python loops for filtering data. Instead, create a "mask" array of
Code explanation: A NumPy array
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By: @CodeProgrammer β¨
Avoid slow Python loops for filtering data. Instead, create a "mask" array of
True/False values based on a condition. Applying this mask to your original array instantly selects only the elements where the mask is True, which is significantly faster.import numpy as np
# Create an array of data
data = np.array([10, 55, 8, 92, 43, 77, 15])
# Create a boolean mask for values greater than 50
high_values_mask = data > 50
# Use the mask to select elements
filtered_data = data[high_values_mask]
print(filtered_data)
# Output: [55 92 77]
Code explanation: A NumPy array
data is created. Then, a boolean array high_values_mask is generated, which is True for every element in data greater than 50. This mask is used as an index to efficiently extract and print only those matching elements from the original array.#Python #NumPy #DataScience #CodingTips #Programming
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