sig
type elt
type t
val mean_opt :
Distributions.Features.Opt.t -> Distributions.Features.Opt.elt option
val variance_opt :
Distributions.Features.Opt.t -> Distributions.Features.Opt.elt option
val skewness_opt :
Distributions.Features.Opt.t -> Distributions.Features.Opt.elt option
val kurtosis_opt :
Distributions.Features.Opt.t -> Distributions.Features.Opt.elt option
end