RSUBSTR Function
replaces substrings in each entry of a given matrix
- RSUBSTR(
,
,
,
)
The inputs to the RSUBSTR subroutine are as follows:
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- is any
character matrix.

- is an
matrix or a scalar that determines
the starting positions for substrings to be replaced.
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- is an
matrix or a scalar that
determines the lengths of substrings to be replaced.

- is an
matrix or a scalar
that specifies the replacement strings.
The RSUBSTR function returns an
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matrix with substrings replaced.
It replaces or substitutes substrings
of the input matrix with new strings.
If
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is zero, the replacement string in

is simply inserted
into the input matrix
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at the position indicated by

.
For example, the following statements replace the
first two characters of each entry in the matrix X
with the corresponding entry in the matrix R:
proc iml;
x = {abc def ghi,jkl mno pqr};
r = {z y x, w v u};
p = 1;
l = 2;
c=rsubstr(x,p,l,r);
print x;
print c;
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