Add column to the output of summary(glht).

Hi

you can check structure of any object by str so

str(fit0)

should give you an insight how fit0 is structured and

str(SumTukey)

gives you structure of SumTukey object (which is probably list). You can manipulate with the output as you wish according to the rules of R.

Cheers
Petr

-----Original Message-----
From: R-help [mailto:r-help-bounces at r-project.org] On Behalf Of John
Sorkin
Sent: Friday, June 24, 2016 3:46 PM
To: r-help at r-project.org
Subject: [R] Add column to the output of summary(glht).


I am trying to make the leap from an R users to an R aficionado . . .

I am trying to understand how add a column to the output of summary (and
to understand how summary() works).

I have run a glmer
fit0 <- glmer(Fall ~
Group+(1|PID),family=poisson(link="log"),data=data[data[,"Group"]!=0,])

and I want to perform adjusted multiple comparisons:

SumTukey <- summary(glht(fit0, linfct= mcp(Group="Tukey")))

which gives beautiful output:

SumTukey

       Simultaneous Tests for General Linear Hypotheses

Multiple Comparisons of Means: Tukey Contrasts


Fit: glmer(formula = Fall ~ Group + (1 | PID), data = data[data[,
    "Group"] != 0, ], family = poisson(link = "log"))

Linear Hypotheses:
           Estimate Std. Error z value Pr(>|z|)
2 - 1 == 0   0.5320     0.5075   1.048    0.717
3 - 1 == 0   0.6554     0.5000   1.311    0.551
4 - 1 == 0   0.9357     0.4655   2.010    0.181
3 - 2 == 0   0.1234     0.4174   0.296    0.991
4 - 2 == 0   0.4037     0.3754   1.075    0.700
4 - 3 == 0   0.2803     0.3651   0.768    0.867
(Adjusted p values reported -- single-step method)

I want to add a column to the output (unadjusted p-values), but I don't see
how this might be done. The output is not a dataframe, nor is it a matix.

class(SumTukey)

[1] "summary.glht" "glht"

It is some class of objects that I don't understand and know nothing about.
How can I add a column to the output of SumTukey [a.k.a. summary(glht(fit0,
linfct= mcp(Group="Tukey")))] ?

Thank you
John


John David Sorkin M.D., Ph.D.
Professor of Medicine
Chief, Biostatistics and Informatics
University of Maryland School of Medicine Division of Gerontology and
Geriatric Medicine Baltimore VA Medical Center
10 North Greene Street
GRECC (BT/18/GR)
Baltimore, MD 21201-1524
(Phone) 410-605-7119
(Fax) 410-605-7913 (Please call phone number above prior to faxing)

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