R help - Jun 2011 - nnet inappropriate fit for class error

Hi,

I am trying to run a nnet algorithm but when I try to use the predict function
with type='class', it gives the following error:

fit <- nnet(y~., size = 1, data = train.set, rang = 0.5, maxit=200, decay =
0)

predict<-predict(fit,test.set,type='class')
Error in predict.nnet(fit, test.set, type = "class") : 
 inappropriate fit for class

I couldn't figure out the reason for this, are there any specifications to
use type='class' that I am missing?

Thank you,

Duygu Gunaydin

On Tue, 31 May 2011, Duygu Gunaydin wrote:
> Hi,
>
> I am trying to run a nnet algorithm but when I try to use the predict
function with type='class', it gives the following error:
>
> fit <- nnet(y~., size = 1, data = train.set, rang = 0.5, maxit=200,
decay = 0)
>
> predict<-predict(fit,test.set,type='class')
> Error in predict.nnet(fit, test.set, type = "class") :
> inappropriate fit for class
>
> I couldn't figure out the reason for this, are there any specifications
to use type='class' that I am missing?
Please see the footer of this message.   Very likely 'y' was not a 
factor, but we haven't been told what it is.
>
> Thank you,
>
> Duygu Gunaydin
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-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
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