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# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
# ABLT -- Vector boolean less than. C[i], type INT, is set to 1 if
# A[i] is less than B[i], else C[i] is set to zero.
procedure abltr (a, b, c, npix)
real a[ARB], b[ARB]
int c[ARB]
int npix
int i
begin
do i = 1, npix
if (a[i] < b[i])
c[i] = 1
else
c[i] = 0
end
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