I use breeze's collections (namely DenseVector), in which I have integers and doubles and the like, and use them a little like you might use numpy's arrays. I stumbled upon https://github.com/non/s...

I thought this should be straight forward: import spire.math.Rational val seq = Vector(Rational(1, 4), Rational(3, 4)) val sum = seq.sum // missing: scala.Numeric val prod = seq.product // missin...