[R-sig-ME] Model with no random intercept?

[Philipp Singer]

Your syntax is correct, you need to specify it as

cslt_sspref ~ 1 + epiPeriod + (0+epiPeriod|ss_pref)

Best,
Philipp

On 10/29/2015 06:41 AM, Salmon, Maëlle wrote:
> Dear help-list,
>
> Is it possible to have a random effect without random intercept?
>
> My model is
> formula <- "cslt_sspref ~ 1 + epiPeriod + (epiPeriod|ss_pref)"
> modelTest1 <- glmer(formula, dataCarambars, family=poisson())
>
> But what I would like is something like
> formula <- "cslt_sspref ~ 1 + epiPeriod + ((0+epiPeriod)|ss_pref)"
> modelTest1 <- glmer(formula, dataCarambars, family=poisson())
>
> i.e. only epiPeriod with a random effect of ss_pref. I have tried different syntaxes with 0, -1, etc. but I could not find the right syntax.
>
> How can I avoid this issue and eliminate the random intercept? Maybe I cannot?
>
> Thanks a lot in advance, best wishes
>
> Maëlle Salmon.
>
> _______________________________________________
> R-sig-mixed-models at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-sig-mixed-models