Adjusting p value across models
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Hi,
I have multiple different models in my overall projects. These have to stay distinct, rather than combining them into a larger multivariate model. I'd like to post-hoc adjust the p-values produced by each model for the multiplicity of models in the project. The base p.adjust function could do this, but emmeans sometimes outputs pvalues of '< 0.0001', which preclude doing this accurately.
Is there a way to output more significant digits for these pvalues?
The emmeans digits options don't seem to affect this.
Thanks
The "<0.0001" is generated by the print
method for the emmGrid
object. If you do
smry <- summary(contrast(...))
smry$p.value
You will get the actual P values. This works because summary()
results in an extension of data.frame
Thanks. I also figured out an alternative approach: I run a multivariate model, but then in the contrast function I use simple=list(grouping variable) and combine=TRUE. That seems to give the same result as running separate models for each of the grouping variable levels, and then adjusting p values across all the models.