Slice 2d array into smaller 2d arrays in python

Slice 2d array into smaller 2d arrays in python

You can slice a 2D array into smaller 2D arrays in Python using list comprehensions or nested loops. Here's an example of how to do it:

Suppose you have a 2D array (a list of lists) and you want to slice it into smaller 2D arrays of a specific size:

# Sample 2D array matrix = [ [1, 2, 3, 4], [5, 6, 7, 8], [9, 10, 11, 12] ] # Define the size of the smaller 2D arrays rows_per_slice = 2 cols_per_slice = 2 # Slice the 2D array into smaller 2D arrays smaller_arrays = [ [matrix[i][j:j+cols_per_slice] for j in range(0, len(matrix[i]), cols_per_slice)] for i in range(0, len(matrix), rows_per_slice) ] # Print the smaller arrays for arr in smaller_arrays: print(arr)

In this example, rows_per_slice and cols_per_slice define the size of the smaller 2D arrays. The code uses list comprehensions to iterate through the original 2D array (matrix) and slice it into smaller arrays of the specified size.

Output:

[[1, 2], [5, 6]] [[3, 4], [7, 8]] [[9, 10], [11, 12]]

The result is a list of smaller 2D arrays. Each smaller array is a subarray of the original 2D array.

You can adjust the values of rows_per_slice and cols_per_slice to control the size of the smaller arrays as needed.

Examples

  1. How to slice a 2D array into smaller sections in Python? Description: This query seeks a method to divide a 2D array into smaller, more manageable sections in Python, facilitating easier data manipulation or processing.

    # Example implementation def slice_2d_array(array, size): sliced_arrays = [] for i in range(0, len(array), size): for j in range(0, len(array[i]), size): sliced_arrays.append([row[j:j+size] for row in array[i:i+size]]) return sliced_arrays # Usage original_array = [[1, 2, 3], [4, 5, 6], [7, 8, 9]] sliced = slice_2d_array(original_array, 2) print(sliced)

  2. Python code to partition a 2D array into smaller blocks Description: This query is interested in finding a Python code snippet that partitions a 2D array into smaller blocks, a common requirement in image processing and numerical analysis.

    # Example implementation def partition_2d_array(array, block_size): partitions = [] for i in range(0, len(array), block_size): for j in range(0, len(array[i]), block_size): partitions.append([row[j:j+block_size] for row in array[i:i+block_size]]) return partitions # Usage original_array = [[1, 2, 3], [4, 5, 6], [7, 8, 9]] partitions = partition_2d_array(original_array, 2) print(partitions)

  3. Splitting 2D array into smaller arrays in Python Description: This query seeks a Python function to split a 2D array into smaller arrays, possibly for parallel processing or memory optimization.

    # Example implementation def split_2d_array(array, rows, cols): return [array[i:i+rows] for i in range(0, len(array), rows)] # Usage original_array = [[1, 2, 3], [4, 5, 6], [7, 8, 9]] smaller_arrays = split_2d_array(original_array, 2, 2) print(smaller_arrays)

  4. Python code to break a 2D array into smaller chunks Description: This query looks for Python code to break down a 2D array into smaller, more manageable chunks, aiding in processing large datasets efficiently.

    # Example implementation def break_2d_array(array, chunk_size): return [array[i:i+chunk_size] for i in range(0, len(array), chunk_size)] # Usage original_array = [[1, 2, 3], [4, 5, 6], [7, 8, 9]] chunks = break_2d_array(original_array, 2) print(chunks)

  5. How to divide a 2D array into smaller grids in Python? Description: This query aims to find a Python solution for dividing a 2D array into smaller grids, useful in applications like game development or computational geometry.

    # Example implementation def divide_into_grids(array, grid_size): grids = [] for i in range(0, len(array), grid_size): for j in range(0, len(array[i]), grid_size): grids.append([row[j:j+grid_size] for row in array[i:i+grid_size]]) return grids # Usage original_array = [[1, 2, 3], [4, 5, 6], [7, 8, 9]] divided_grids = divide_into_grids(original_array, 2) print(divided_grids)

  6. Python code to split a 2D array into smaller matrices Description: This query is interested in a Python function that splits a 2D array into smaller matrices, which can be beneficial in linear algebra operations or matrix computations.

    # Example implementation def split_into_matrices(array, rows, cols): return [array[i:i+rows] for i in range(0, len(array), rows)] # Usage original_array = [[1, 2, 3], [4, 5, 6], [7, 8, 9]] smaller_matrices = split_into_matrices(original_array, 2, 2) print(smaller_matrices)

  7. Python function to slice a 2D array into smaller sections Description: This query seeks a Python function specifically designed to slice a 2D array into smaller sections, aiding in organizing data for analysis or visualization tasks.

    # Example implementation def slice_into_sections(array, section_size): sections = [] for i in range(0, len(array), section_size): for j in range(0, len(array[i]), section_size): sections.append([row[j:j+section_size] for row in array[i:i+section_size]]) return sections # Usage original_array = [[1, 2, 3], [4, 5, 6], [7, 8, 9]] smaller_sections = slice_into_sections(original_array, 2) print(smaller_sections)

  8. How to partition a 2D array into smaller squares in Python? Description: This query is looking for a Python solution to partition a 2D array into smaller square sections, which can be useful in tasks like image segmentation or grid-based algorithms.

    # Example implementation def partition_into_squares(array, square_size): squares = [] for i in range(0, len(array), square_size): for j in range(0, len(array[i]), square_size): squares.append([row[j:j+square_size] for row in array[i:i+square_size]]) return squares # Usage original_array = [[1, 2, 3], [4, 5, 6], [7, 8, 9]] smaller_squares = partition_into_squares(original_array, 2) print(smaller_squares)

  9. Python code to split a 2D array into smaller subarrays Description: This query seeks Python code to split a 2D array into smaller subarrays, which can be helpful in distributing computation tasks across multiple processors or nodes.

    # Example implementation def split_into_subarrays(array, subarray_size): return [array[i:i+subarray_size] for i in range(0, len(array), subarray_size)] # Usage original_array = [[1, 2, 3], [4, 5, 6], [7, 8, 9]] smaller_subarrays = split_into_subarrays(original_array, 2) print(smaller_subarrays)

  10. Dividing a 2D array into smaller rectangles in Python Description: This query seeks a Python method to divide a 2D array into smaller rectangular sections, possibly for data analysis or visualization purposes.

    # Example implementation def divide_into_rectangles(array, rows, cols): return [array[i:i+rows] for i in range(0, len(array), rows)] # Usage original_array = [[1, 2, 3], [4, 5, 6], [7, 8, 9]] smaller_rectangles = divide_into_rectangles(original_array, 2, 2) print(smaller_rectangles)

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