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| Format of decision forest using catagorical data http://forum.alglib.net/viewtopic.php?f=2&t=2299 |
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| Author: | wqxl309 [ Wed Apr 22, 2015 12:08 am ] |
| Post subject: | Format of decision forest using catagorical data |
Hi, I am new to Alglib and I am trying to use the decision forest class with both predictors and response variables are categorical, i.e strings in C#, I was just wondering how should I form the input dataset. I know that the function requires " double[,] xy" as the training data, and I looked at the general principal but I am still a little confused. My data set is like the following, where the first column is the response: [["up", "down", ....] , ["High","Medium" ,"Low",...], ..., ["a", "b", "c"]] should I encode it like this: xy=[[1,0,...], [0,,1,2,...],..., [0,1,2]] could anyone help me with this , thank you so much! |
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