Scilab Wavelet Toolbox Function
Last update : Feburary 2006

wkeep2 - two dimensional signal extraction

Calling Sequence

b=wkeep2(a,row,col)

Parameters

Description

This function extracts matrix from an input matrix at the center. Row and Column information should be provided to determine the position. When the size is not evenly given, for example, odd from even or even from odd, the matrix would be an element aligned to the right and lower corner.

Examples


-->a=[1 2 3 4 5 6;7 8 9 10 11 12;13 14 15 16 17 18];
-->a
 a  =
 
!   1.     2.     3.     4.     5.     6.  !
!   7.     8.     9.     10.    11.    12. !
!   13.    14.    15.    16.    17.    18. !

-->b=wkeep2(a,3,2)                                  
 b  =
 
!   3.     4.  !
!   9.     10. !
!   15.    16. !

-->b=wkeep2(a,2,2)
 b  =
 
!   9.     10. !
!   15.    16. !

-->b=wkeep2(a,2,3)
 b  =
 
!   9.     10.    11. !
!   15.    16.    17. !

  

See Also

wextend ,   wextend2 ,   wkeep