Evaluating math expressions

[folivetti]

I noticed that there are some overloading for math operators. Is it possible to apply a math expression on the columns? Something like:

F.col "x" + 2 * F.col "y" * sin (F.col "z")

also, can you overload the Floating class?

[mchav]

Yes. Expr has a float instance already. I think it's very similar to srtree actually.

https://github.com/mchav/dataframe/blob/main/src/DataFrame/Internal/Expression.hs#L114