asking for help (was RE: [R] nnet trouble, continued)

Sirotkin, Alexander demiurg at
Fri Aug 9 16:06:28 CEST 2002

I agree (mostly) with what you've said here. I did not intend to send 
that comment
to the auther of the software. Well, maybe I should have checked who's 
the author
and wether or not he is subscribed to that list, but... In any case, I 
don't think it justified
the response, which was much more insulting.

As for the question itself - I already found that missing values in 
arguments to predict.nnet()
caused that error. I guess I just have to replace all NAs with means 
before using my data
with nnet. I though that the fact that nnet() accepts na.action = 
na.omit parameter suggests
that predict.nnet() will be able to deal with NAs in one way or another, 
but I guess it's not.

Anyway, thanks.

Liaw, Andy wrote:

>>From: Sirotkin, Alexander [mailto:demiurg at]
>>P.S. Anybody who finds my postings insulting, please write a 
>>mail filter
>>    for my address. Although I can not understand why it may insult
>>    anybody.
>>P.P.S. Must be related to cultural differences, I guess...
>It's not insulting to me, personally, but quite possibly to the author of
>that software, who spent unknown amount of time to create it and give it
>away for free.
>May I suggest that you learn how to ask questions in a way that will
>actually encourage people to help you, if that is your intent?  For starter:
>o Give the version info for VR (which includes nnet), R, and your OS.
>o Give the command(s) that failed, not just the error message.
>o Attach data used, or use a dataset included in R or one of the packages.  
>  "Almost like the iris data" obviously isn't true: there are no NAs in
>I've used nnet quite a few times, and the only occasions that it failed is
>when the data is too large.
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