Is there an easy way to apply bulk conversion to a Deedle frame?

Question

I have a Deedle frame in fsharp with 45 columns, where each column contains floats. I would like to create a new frame by applying a transform to each record in the original frame. Conversion is a simple function as follows:

let minusLogOfOneLess x = -log (1.0-x)

Is there an easy way to do this?

Answer 1

It looks like we missed the unary minus operator when adding operators to the Deedle framework! Along with the unary minus, the rest actually works already.

So you can just change -log(...)to -1.0 * log(...):

let minusLogOfOneLess (x:Frame<_, _>) = -1.0 * (log (1.0 - x))

frame [ "A" => series [1=>0.5; 2=>0.4]]
|> minusLogOfOneLess