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LU decomposition: Difference between revisions
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bldAMat: ?=words(x); do N=1 for ? until N**2>=? /*find matrix size. */
end /*N*/
if N**2\==? then do; say '***error*** wrong # of elements entered:' ?; exit 9
end
do r=1 for N /*build A matrix.*/
do c=1 for N; #=# + 1; _=word(x, #); A.r.c=_
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