[R] building a multi-output neural network

[Qin Liu]

Hi, there:

Any body has experience in building a multi-output neural network? 

<net3<-nnet(train[,c(1:8,10,11)],train[,c(9,12)],size=5,
maxit=10000,linout=T)
# build a 10-5-2 neural network 

<pred<-predict(net3, test[,c(1:8,10,11)])
#I am trying to predict two columns of test, which means test[,c(9,12)]

I was expecting "pred" be a two-column array. However, it seems the results
were mixed up, i.e. the length of "test" data set is 10, instead of getting
a 10x2 array of predicting results, I got a 20x1 array. How can I
distinguish which of them are predicting results for which column?

Thank you very much for helping me out.

Qin