Language Reference

REMOVE Function

discards elements from a matrix

REMOVE( matrix, indices)

The inputs to the REMOVE function are as follows:

matrix

is a numeric or character matrix or literal.

indices

refers to a matrix containing the indices of elements that are removed from matrix.

The REMOVE function returns as a row vector elements of the first argument, with elements corresponding to the indices in the second argument discarded and the gaps removed. The first argument is indexed in row-major order, as in subscripting, and the indices must be in the range 1 to the number of elements in the first argument. Noninteger indices are truncated to their integer part. You can repeat the indices, and you can give them in any order. If all elements are removed, the result is a null matrix (zero rows and zero columns).

Thus, the following statement removes the third element, producing the result shown:

  
    a=remove({ 5 6, 7 8} , 3);
 

  
                   A 
                   5    6   8
 

The following statement causes all but the fourth element to be removed, giving the result shown:

  
    a=remove({ 5 6 7 8} , { 3 2 3 1} );
 

  
                          A 
                          8