it seems we are using the version of VGAM and R.
> packageDescription("VGAM")$Version
[1] "0.7-9"
> sessionInfo()
R version 2.9.1 (2009-06-26)
i386-pc-mingw32
locale:
LC_COLLATE=English_United States.1252;LC_CTYPE=English_United
States.1252;LC_MONETARY=English_United
States.1252;LC_NUMERIC=C;LC_TIME=English_United States.1252
attached base packages:
[1] stats4 splines stats graphics grDevices utils datasets
methods base
other attached packages:
[1] MASS_7.2-48 nnet_7.2-48 VGAM_0.7-9
loaded via a namespace (and not attached):
[1] tools_2.9.1
On Sun, Aug 16, 2009 at 12:34 PM, Gavin Simpson <gavin.simp...@ucl.ac.uk>wrote:
> On Sun, 2009-08-16 at 10:48 -0700, Hongwei Dong wrote:
> > I'm quite sure the VGAM package has been installed because I used it to
> > estimate the model before I use summary(). One reason I can guess is that
> > the default method for summary() is S3, but here it is S4. But I'm not
> sure
> > and don't know what to do with that. Here is an example you can
> reproduce:
> >
> > counts = c(18,17,15,20,10,20,25,13,12)
> > outcome = gl(3,1,9)
> > treatment = gl(3,3)
> > print(d.AD <- data.frame(treatment, outcome, counts))
> > vglm.D93 = vglm(counts ~ outcome + treatment, family=poissonff)
> > summary(vglm.D93)
>
> Works for me with:
>
> > packageDescription("VGAM")$Version
> [1] "0.7-9"
> > sessionInfo()
> R version 2.9.1 Patched (2009-08-07 r49107)
> i686-pc-linux-gnu
>
> locale:
>
> LC_CTYPE=en_GB.UTF-8;LC_NUMERIC=C;LC_TIME=en_GB.UTF-8;LC_COLLATE=en_GB.UTF-8;LC_MONETARY=C;LC_MESSAGES=en_GB.UTF-8;LC_PAPER=en_GB.UTF-8;LC_NAME=C;LC_ADDRESS=C;LC_TELEPHONE=C;LC_MEASUREMENT=en_GB.UTF-8;LC_IDENTIFICATION=C
>
> attached base packages:
> [1] stats4 splines stats graphics grDevices utils
> [7] datasets methods base
>
> other attached packages:
> [1] VGAM_0.7-9
>
> loaded via a namespace (and not attached):
> [1] tools_2.9.1
>
> Are you using an older R or version of VGAM? Is this in a clean session?
>
> G
>
> >
> > With this, I got:
> >
> > > summary(vglm.D93)
> > Length Class Mode
> > 1 vglm S4
> >
> > If I just type "vglm.D93", I got:
> >
> > Call:
> > vglm(formula = counts ~ outcome + treatment, family = poissonff)
> >
> > Coefficients:
> > (Intercept) outcome2 outcome3 treatment2 treatment3
> > 3.044522e+00 -4.542553e-01 -2.929871e-01 7.766813e-16 3.009745e-16
> >
> > Degrees of Freedom: 9 Total; 4 Residual
> > Residual Deviance: 5.129141
> > Log-likelihood: -23.38066
> >
> >
> > Looking forward to see more advices. Thanks.
> >
> > Harry
> >
> >
> >
> >
> > On Sat, Aug 15, 2009 at 8:18 PM, Ronggui Huang <ronggui.hu...@gmail.com
> >wrote:
> >
> > > I cannot reproduce what you mentioned. One possible is that you use
> > > summary() without loading VGAM package.
> > >
> > >
> > > 2009/8/16 Hongwei Dong <pdxd...@gmail.com>:
> > > > Hi, R users,
> > > > I'm using the function "vglm" to estimate a multinomial logit model.
> > > Every
> > > > time I use "summary()" to ask for the coefficients and std error, I
> got
> > > > this:
> > > >
> > > > Length Class Mode
> > > > 1 vglm S4
> > > >
> > > > Anyone know what's wrong here? Thanks.
> > > >
> > > > Harry
> > > >
> > > > [[alternative HTML version deleted]]
> > > >
> > > > ______________________________________________
> > > > R-help@r-project.org mailing list
> > > > https://stat.ethz.ch/mailman/listinfo/r-help
> > > > PLEASE do read the posting guide
> > > http://www.R-project.org/posting-guide.html
> > > > and provide commented, minimal, self-contained, reproducible code.
> > > >
> > >
> > >
> > >
> > > --
> > > HUANG Ronggui, Wincent
> > > PhD Candidate
> > > Dept of Public and Social Administration
> > > City University of Hong Kong
> > > Home page: http://asrr.r-forge.r-project.org/rghuang.html
> > >
> >
> > [[alternative HTML version deleted]]
> >
> > ______________________________________________
> > R-help@r-project.org mailing list
> > https://stat.ethz.ch/mailman/listinfo/r-help
> > PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> > and provide commented, minimal, self-contained, reproducible code.
> --
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> Dr. Gavin Simpson [t] +44 (0)20 7679 0522
> ECRC, UCL Geography, [f] +44 (0)20 7679 0565
> Pearson Building, [e] gavin.simpsonATNOSPAMucl.ac.uk
> Gower Street, London [w] http://www.ucl.ac.uk/~ucfagls/
> UK. WC1E 6BT. [w] http://www.freshwaters.org.uk
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>
>
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