[R] Any help on R code interpretation?

Thierry Onkelinx thierry.onkelinx at inbo.be
Thu Dec 22 14:23:21 CET 2016

Dear Marna,

It's a combinations of two functions: %*% and t()
help("%*%") and help("t") will open their helpfiles.

Best regards,

ir. Thierry Onkelinx
Instituut voor natuur- en bosonderzoek / Research Institute for Nature and
team Biometrie & Kwaliteitszorg / team Biometrics & Quality Assurance
Kliniekstraat 25
1070 Anderlecht

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

2016-12-22 14:08 GMT+01:00 Marna Wagley <marna.wagley op gmail.com>:

> HI R user,
> I was looking a r code and saw "%*%t", what does it("%*%t") mean?. The
> example is given below.
> For example: here is the code where "%*%t" has been used. when I run the
> formula but did not run in my data.
> prediction=plogis(as.matrix(mod7)%*%t(with(subset(data,
> site!='AB'),cbind(1,
> site=='BC', site =='MM', site =='XY',Temp,Treatment=='Local'))))
> Can I get the same result of above using the following code? Do both codes
> give same results?
> ab<-with(subset(data,site!='AB'),cbind(1,site=='BC', site =='MM', site ==
> 'XY',Temp,Treatment=='Local'))
> prediction =plogis(as.matrix(mod7),(ab))
> Thanks,
> MW
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