Hello Again,
Doesn't anyone know where the problem might be? I could not get any more
information from the help page.
Many thanks
Best
Sergii
[R] question about multinom function (nnet)
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From: Sergii Ivakhno <Sergii.Ivakhno_at_cancer.org.uk
<mailto:Sergii.Ivakhno_at_cancer.org.uk?Subject=Re:%20[R]%20question%20a
bout%20multinom%20function%20%28nnet%29> >
Date: Wed, 17 Mar 2010 14:59:10 +0000
Hello Again,
Dear All.
I have the following table that I want to analyze using multinom
function
freq segments sample
4271 Seg1 tumour
4311 Seg2 tumour
3515 Seg1 normal
3561 Seg2 normal
I want to compare model with both factors to the one where only sample
is present.
model1=multinom(freq~segments+sample,data=table)
model2=multinom(freq~ sample,data=table)
anova(model2,model1)
Likelihood ratio tests of Multinomial Models
Response: freq
Model Resid. df Resid. Dev Test Df LR stat. Pr(Chi)
1 sample 6 5.5452609828
2 segments + sample 3 0.0001600513 1 vs 2 3 5.545101 0.1359658
What I do not understand is where df of 6 and 3 come from? Shouldn't
they be 2 and 1?
Many thanks for your help in advance
Sincerely
Sergii
________________________________
Sergii Ivakhno
PhD student
Computational Biology Group
Cancer Research UK Cambridge Research Institute Li Ka Shing Centre
Robinson Way
Cambridge CB2 0RE
England
+44 (0)1223 404293 (O)
+44 (0)1223 404128 (F)
http://www.compbio.group.cam.ac.uk <http://www.compbio.group.cam.ac.uk/>
<http://www.compbio.group.cam.ac.uk/
<http://www.compbio.group.cam.ac.uk/> > /
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----------------------------------------------
Sergii Ivakhno
PhD student
Computational Biology Group
Cancer Research UK Cambridge Research Institute
Li Ka Shing Centre
Robinson Way
Cambridge CB2 0RE
England
+44 (0)1223 404293 (O)
+44 (0)1223 404128 (F)
http://www.compbio.group.cam.ac.uk <http://www.compbio.group.cam.ac.uk/>
/
This communication is from Cancer Research UK. Our website is at
www.cancerresearchuk.org. We are a charity registered under number 1089464 and a
company limited by guarantee registered in England & Wales under number
4325234. Our registered address is 61 Lincoln's Inn Fields, London WC2A 3PX.
Our central telephone number is 020 7242 0200.
This communication and any attachments contain information which is confidential
and may also be privileged. It is for the exclusive use of the intended
recipient(s). If you are not the intended recipient(s) please note that any
form of disclosure, distribution, copying or use of this communication or the
information in it or in any attachments is strictly prohibited and may be
unlawful. If you have received this communication in error, please notify the
sender and delete the email and destroy any copies of it.
E-mail communications cannot be guaranteed to be secure or error free, as
information could be intercepted, corrupted, amended, lost, destroyed, arrive
late or incomplete, or contain viruses. We do not accept liability for any such
matters or their consequences. Anyone who communicates with us by e-mail is
taken to accept the risks in doing so.
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