predictions to newdata by LMM through lmer (Ben Bolker)

Tetsuya Michinaka <zhangyf at ...> writes:

Dear Ben Bolker,

I registered inR-Forge, but I still do not know where to download
 the development version of the package lme4.

You don't need to register.

When I tried "install.packages("lme4",

repos=c("http://lme4.r-forge.r-project.org/repos",
  getOptions("repos")["CRAN"]))",

There was a typo in the README file, fixed now.
This should be getOption("repos")["CRAN"], not getOptions(...)

When I installed "install_github("lme4",user="lme4")", I also failed.
Could you please give me some detailed advice?
Thanks again.

In order to use install_github you need to install the devtools
package *and* all of the developer tools (compilers etc.).