Github user yinxusen commented on the issue:
https://github.com/apache/spark/pull/14229
@felixcheung I add some aliases for spark.lda related functions. However, I
am not quite understand it. From
[here](https://cran.r-project.org/web/packages/roxygen2/vignettes/rd.html) I
can see that
*When you use ?x, help("x") or example("x") R looks for an Rd file
containing \alias{x}. It then parses the file, converts it into html and
displays it.*
But when I using `?GroupedData-method`, sparkr-shell cannot find related
topics.
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