droplevels

[Uncs...@ad.unc.edu]

Hi all, 

first of all, many thanks to Joshua and Caspar for hard work developing and maintaining tidyLPA. Now to my question. I have a tibble with 7 variables over 1139 observations. I am piping everything, code is:

PLStib  %>%

  select(S_ID, WPPSIRVSTD, ECSTDSCR, MLUM_T.x, MLUM_T.y, NDW_T.x, NDW_T.y) %>%

  scale() %>%

  estimate_profiles(1:4, 

                        variances = c("equal", "varying"),

                        covariances = c("zero", "varying"),

                        package = "mclust") %>%

  compare_solutions(statistics = c("AIC", "BIC")) %>%

  plot_profiles()

and I am getting the error:

Error in UseMethod("droplevels") : 

  no applicable method for 'droplevels' applied to an object of class "NULL"

I have already tried installing the development version from Github. Any ideas?

Thank you in advance, 

Sarah P.