Hello --
I'm trying to use a Stats::Formula to multiply two Stats::Vectors, and am
having trouble with the reported total (using .flags(total)).
Take, for example, the following:
Stats::Vector a; // .init(10), assume a[i] = 2 for all i;
Stats::Vector b; // .init(10), assume b[0] = 0, b[1] = 1, b[2] = 2, etc
Stats::Formula c = a * b; // a.size() must equal b.size() for this to
work;
When c is calculated, it does the equivalent of the following:
for (int i = 0; i < size(); i++) {
c[i] = a[i] * b[i];
}
This implies:
Sum(c[i]) = 90;
...which is correct. But when the total() function is called on c, the
following calculation takes place:
c.total() = a.total() * b.total();
This implies:
c.total() = 20 * 45
c.total() = 900
...which is incorrect, at least according to what I think should be reported
(I think c.total() should be equivalent to Sum(c[i]); in this case, it's
actually Sum(c[i]) * size()).
Is this desired behavior for the Stats::Formula class, or is this a bug?
Thanks,
-Vilas
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