Message-ID: <D5FA03935F7418419332B61CA255F65F817933F447@USCTMXP51012.merck.com>
Date: 2012-10-17T18:32:27Z
From: Liaw, Andy
Subject: Random Forest for multiple categorical variables
In-Reply-To: <CAK=huh4Rjx0v8ZXQxY4=3rkknrfw__GVQAzxb=5VFOv=1-Y_2Q@mail.gmail.com>
How about taking the combination of the two? E.g., gamma = factor(paste(alpha, beta1, sep=":")) and use gamma as the response.
Best,
Andy
-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] On Behalf Of Gyanendra Pokharel
Sent: Tuesday, October 16, 2012 10:47 PM
To: R-help at r-project.org
Subject: [R] Random Forest for multiple categorical variables
Dear all,
I have the following data set.
V1 V2 V3 V4 V5 V6 V7 V8 V9 V10 alpha beta
1 11 1 11 1 11 1 11 1 11 alpha beta1
2 12 2 12 2 12 2 12 2 12 alpha beta1
3 13 3 13 3 13 3 13 3 13 alpha beta1
4 14 4 14 4 14 4 14 4 14 alpha beta1
5 15 5 15 5 15 5 15 5 15 alpha beta1
6 16 6 16 6 16 6 16 6 16 alpha beta2
7 17 7 17 7 17 7 17 7 17 alpha beta2
8 18 8 18 8 18 8 18 8 18 alpha beta2
9 19 9 19 9 19 9 19 9 19 alpha beta2
10 20 10 20 10 20 10 20 10 20 alpha beta2
I want to use the randomForest classification. If there is one categorical
variable with different classes, we can use
randomForest(resp~., data, ........), but here I need to classify the data
with two categorical variables. Any idea will be great.
Thanks
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