Mathematical, comparison, and logical operators

TimeSeries supports common mathematical (such as .+), comparison (such as .==) , and logic (such as .&) operators. The operations are only calculated on values that share a timestamp. All of the operations must be treat as dot-call.

Mathematical

Mathematical operators create a TimeArray object where values are computed on shared timestamps when two TimeArray objects are provided. Operations between a single TimeArray and Int or Float are also supported. The number can precede the TimeArray object or vice versa (e.g. cl .+ 2 or 2 .+ cl). Broadcasting single-column arrays over multiple columns to perform operations is also supported.

The exclusion of / and ^ from this logic are special cases. In matrix operations / has been confused with being equivalent to the inverse, and because of the confusion base has excluded it. It is likewise excluded here. Base uses ^ to indicate matrix self-multiplication, and so it is not implemented in this context.

Comparison

Comparison operators create a TimeArray of type Bool. Values are compared on shared timestamps when two TimeArray objects are provided. Broadcasting single-column arrays over multiple columns to perform comparisons is supported, as are comparisons between a single TimeArray and Int, Float, or Bool values. The semantics of an non-dot operators (>) is unclear, and such operators are not supported.

Logic

Logical operators are defined for TimeArrays of type Bool and return a TimeArray of type Bool. Values are computed on shared timestamps when two TimeArray objects are provided. Operations between a single TimeArray and Bool are also supported.