[R] package Formula????

CHIRIBOGA Xavier xavier.chiriboga at unine.ch
Fri Mar 11 08:57:33 CET 2016

Dear all, again me

I have already updated my version of R. But still appears this message:

plot(ctree(Surv(hours,state)~soil+volatile, data=data))
Error in loadNamespace(name) : there is no package called 'Formula'

I cannot find a package "Formula" in my list of packages. What to do in that case?

Thank you,


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