flipud

Flip matrices up-down

Syntax

• B = flipud(A)
  

Description

B = flipud(A) returns A with rows flipped in the up-down direction, that is, about a horizontal axis.

If A is a column vector, then flipud(A) returns a vector of the same length with the order of its elements reversed. If A is a row vector, then flipud(A) simply returns A.

Examples

If A is the 3-by-2 matrix,

• A =
      1    4
      2    5
      3    6
  

then flipud(A) produces

•     3    6
      2    5
      1    4
  

If A is a column vector,

• A =
      3
      5
      7
  

then flipud(A) produces

• A =
      7
      5
      3
  

Limitations

The array being operated on cannot have more than two dimensions. This limitation exists because the axis upon which to flip a multidimensional array would be undefined.