Reverses the rows of a matrix. The syntax for its use is
y = flipud(x)
where x
is matrix. If x
is an N-dimensional array then
the first dimension is reversed.
The following example shows flipud
applied to a 2D matrix.
--> x = int32(rand(4)*10) x = <int32> - size: [4 4] Columns 1 to 4 8 6 9 9 9 0 9 4 1 2 1 8 9 5 9 1 --> flipud(x) ans = <int32> - size: [4 4] Columns 1 to 4 9 5 9 1 1 2 1 8 9 0 9 4 8 6 9 9
For a 3D array, note how the rows in each slice are flipped.
--> x = int32(rand(4,4,3)*10) x = <int32> - size: [4 4 3] (:,:,1) = Columns 1 to 4 8 6 9 9 9 0 9 4 1 2 1 8 9 5 9 1 (:,:,2) = Columns 1 to 4 4 6 6 6 9 0 7 1 7 8 7 7 9 9 3 0 (:,:,3) = Columns 1 to 4 2 6 4 1 0 3 3 4 0 9 7 4 8 0 7 6 --> flipud(x) ans = <int32> - size: [4 4 3] (:,:,1) = Columns 1 to 4 9 5 9 1 1 2 1 8 9 0 9 4 8 6 9 9 (:,:,2) = Columns 1 to 4 9 9 3 0 7 8 7 7 9 0 7 1 4 6 6 6 (:,:,3) = Columns 1 to 4 8 0 7 6 0 9 7 4 0 3 3 4 2 6 4 1