Happy Valentine's Day!
data one;
do t = 1 to 3*constant("pi") by 0.05;
x = 16*sin(t)**3;
y = 13*cos(t) - 5*cos(2*t) - 2*cos(3*t) - cos(4*t);
output;
end;
run;
data two;
set one;
if _n_ = 70 then label = "Valentine's ...
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