??glht would tell you that glht is a function from the multcomp package.
You need to load a package before you can use its functions.
library(multcomp)
ir. Thierry Onkelinx
Instituut voor natuur- en bosonderzoek / Research Institute for Nature and
Forest
team Biometrie & Kwaliteitszorg / team Biometrics & Quality Assurance
Kliniekstraat 25
1070 Anderlecht
Belgium
To call in the statistician after the experiment is done may be no more
than asking him to perform a post-mortem examination: he may be able to say
what the experiment died of. ~ Sir Ronald Aylmer Fisher
The plural of anecdote is not data. ~ Roger Brinner
The combination of some data and an aching desire for an answer does not
ensure that a reasonable answer can be extracted from a given body of data.
~ John Tukey
2015-02-26 11:21 GMT+01:00 CHIRIBOGA Xavier <xavier.chiriboga at
unine.ch>:
> Dear all ,
>
>
>
> I am trying to do a Tukey comparison, but a message appears:
>
>
>
> tuk<-glht(mod0,linfct=mcp(Soil="Tukey"));summary(tuk)
> Error: could not find function "glht"
>
>
>
> Anyone knows how to fix it?
>
>
>
> Thanks a lot!
>
>
>
> Xavier
>
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