Lathe.jl: No Method Matching Error

Specific Domains Modelling & Simulations
1

Hello Everyone:

I am using Lathe:preprocess

Have attempted to activate the
following functions from HERE:

begin
	mutable struct OneHotEncoder{P} <: Lathe.preprocess.Encoder
	    predict::P
	    function OneHotEncoder()
	        predict(df::DataFrame, symb::Symbol) = _onehot(df, symb)
	        P =  typeof(predict)
	        return new{P}(predict)
	    end
	end
end

No function return message, but no error

Then,

begin
function _onehot(df,symb)
	    copy = df
	    for c in unique(copy[!,symb])
	        copy[!,Symbol(c)] = copy[!,symb] .== c
	    end
	    return(copy)
	end
end

Returning ‘_onehot (generic function with 1 method)’

I am encountering an error when I attempt to implement:

        Lathe.preprocess.OneHotEncoder(CoDMW, "HeadShots")
	Lathe.preprocess.OneHotEncoder(CodMW, "Injuries")
	Lathe.preprocess.OneHotEncoder(CodMW, "SharedHits")

But I am encountering the following error:

MethodError: no method matching Lathe.preprocess.OneHotEncoder(::DataFrames.DataFrame, ::String)

When I replace the method with _onehot I get
new columns with the categorical values as
the column names, and the row values as Bool
types.

Is there a reason why the first function is not recognized?

Thank you.