INSERT Function
inserts one matrix inside another
- INSERT( x, y, row<, column>)
The inputs to the INSERT function are as follows:
- x
- is the target matrix.
It can be either numeric or character.
- y
- is the matrix to be inserted into the target.
It can be either numeric or character,
depending on the type of the target matrix.
- row
- is the row where the insertion is to be made.
- column
- is the column where the insertion is to be made.
The INSERT function returns the result of inserting
the matrix y inside the matrix x at the place
specified by the row and column arguments.
This is done by splitting x either horizontally
or vertically before the row or column specified
and concatenating y between the two pieces.
Thus, if x is m rows by n columns, row can range
from 0 to m+1 and column can range from 0 to n+1.
However, it is not possible to insert in both
dimensions simultaneously, so either row
or column must be 0, but not both.
The column argument is optional and defaults to 0.
Also, the matrices must conform in the
dimension in which they are joined.
For example, the statements
a={1 2, 3 4};
b={5 6, 7 8};
c=insert(a, b, 2, 0);
d=insert(a, b, 0, 3);
produce the result
C 4 rows 2 cols (numeric)
1 2
5 6
7 8
3 4
D 2 rows 4 cols (numeric)
1 2 5 6
3 4 7 8
C shows the result of insertion in the
middle, while D shows insertion on an end.
Copyright © 1999 by SAS Institute Inc., Cary, NC, USA. All rights reserved.