Removing Rows or Columns from a Matrix - MATLAB & Simulink (original) (raw)
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The easiest way to remove a row or column from a matrix is to set that row or column equal to a pair of empty square brackets []. For example, create a 4-by-4 matrix and remove the second row.
A = 4×4
16 2 3 13
5 11 10 8
9 7 6 12
4 14 15 1A = 3×4
16 2 3 13
9 7 6 12
4 14 15 1Now remove the third column.
A = 3×3
16 2 13
9 7 12
4 14 1You can extend this approach to any array. For example, create a random 3-by-3-by-3 array and remove all of the elements in the first matrix of the third dimension.
B = rand(3,3,3); B(:,:,1) = [];