Extract Column
MediumData EngineeringMatrixArrayMath
Description
Given a 2D array matrix (rows of equal length) and a column index col, return the values in that column as an array, top to bottom.
Examples
Input:
matrix = [[1,2,3],[4,5,6]], col = 1Output:
[2,5]Explanation:
Reading column 1 from each row yields [2,5].
Input:
matrix = [[7,8],[9,10]], col = 0Output:
[7,9]Explanation:
Reading column 0 from each row yields [7,9].
Input:
matrix = [[1,2],[3,4],[5,6]], col = 1Output:
[2,4,6]Explanation:
Reading column 1 from each row yields [2,4,6].
Constraints
- •
0 ≤ col < number of columns