Feature Request: Option to Ignore Zeros in Res and Eta Figures

[billdenney]

In many models, some subjects and/or rows are non-informative and have 0 for the residuals and etas. It would be helpful to have an option to ignore zero values when plotting residuals and etas to only have the informative rows present.

In parallel with this, a zapsmall_digits option (calling zapsmall() on the value to be plotted) would be useful as there are sometimes near-zero (but not precisely zero) values in these columns (especially etas; I don't think I've seen that happen with residuals).

[billdenney]

A simple way to do this without additional options is the following:

xpdb <-
  xpdb_raw %>%
  mutate(
    CWRES=na_if(CWRES, 0)
  )