Remove a row and corresponding column in a square matrix SAS/IML

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You may code it as a function call.

proc iml;

a=shape(1:25,5,5);
n=nrow(a);
***remove R3C3****;
%let k=3;
idx1=cusum( &k || j(1,n-1,5) );
idx2=((&k-1)*n+1):&k*n;


b=shape(remove(a,idx1||idx2),n-1,n-1);
print  idx1 idx2 ;
print  a ;
print  b ;
quit;

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关键词：respond REMOVE column matrix Square function matrix

?///??

谢谢分享
function与连接符||之间很巧妙的应用.



idx1 || idx2正好与remove function 中的indices对应

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.