I would probably use repa for this sort of application. <span style="font-family:&#39;.HelveticaNeueUI&#39;;white-space:nowrap"><a href="http://hackage.haskell.org/package/repa">http://hackage.haskell.org/package/repa</a></span><br>
<br>On Thursday, September 12, 2013, Nathan Hüsken  wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hey,<br>
<br>
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:<br>
<br>
    [Feature]<br>
<br>
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<br>
<br>
type Feature = [Float]<br>
<br>
but that would not ensure that every feature has the same number of flaots. I could use tuples<br>
<br>
type Feature = (Float,Float,Float,Float,Float ...)<br>
<br>
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).<br>
<br>
How would you do that?<br>
<br>
Thanks!<br>
Nathan<br>
<br>
<br>
______________________________<u></u>_________________<br>
Beginners mailing list<br>
<a>Beginners@haskell.org</a><br>
<a href="http://www.haskell.org/mailman/listinfo/beginners" target="_blank">http://www.haskell.org/<u></u>mailman/listinfo/beginners</a><br>
</blockquote>