-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 Hi Nathan, It is actually possible (and pretty easy) to encode natural numbers as types [1]. You could create a sequence type which is parameterized over both the element type and the number of contained elements. Nick [1] http://www.haskell.org/haskellwiki/Type_arithmetic On 09/12/2013 10:28 AM, Nathan Hüsken wrote:
Hey,
I am experimenting with machine learning in haskell. For training a model, I need to input a list of features. A features itself is a set of floating point numbers. So my training data has the type:
[Feature]
What I am wondering is which type I should use for Feature. As I said, it is a set of floats. But every feature must have exactly the same number of floats. I could use
type Feature = [Float]
but that would not ensure that every feature has the same number of flaots. I could use tuples
type Feature = (Float,Float,Float,Float,Float ...)
The number of features varies from application to application. And I do not know how to encode that with tuples. Also the number of features can get very big (in extreme cases up to ~1000, in normal cases ~100).
How would you do that?
Thanks! Nathan
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