Syntax: |
matrix = WRAP( matrix, scalar )
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The WRAP
function only accepts a matrix
as its first argument. It wraps the column elements of a matrix by the
specified step size, the scalar second argument.
Suppose the step size is n.
• | If n > 0, the column elements of the matrix are shifted down. The first n elements in the first column are zero filled, then the last n elements of each column are brought into the next column. The last n elements in the last column are lost. |
• | If n = 0, the matrix is returned unchanged. |
• | If n < 0, the column elements of the matrix are shifted up. The first n elements in the first column are lost. The first n elements of each column are brought into the preceding column. The last n elements in the last column are zero filled. |
If the step size is not an integer, only the integer part will be used.
Examples
Suppose you have a matrix M
| 1 2 3 4 | M = | 5 6 7 8 | | 9 10 11 12 |
function | result | |||
WRAP(M,2) |
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WRAP(M,-2) |
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