Hello,

I've hit a bit of a snag here: I had to update to the latest version of R to get ballgown working, but one of the functions I see included in filtering out low expression genes, rowVars, is not available for this version of R.

Using this tutorial: https://rpubs.com/kapeelc12/Ballgown

The rowVars function is employed in filtering:

```
bg_filt = subset(bg,"rowVars(texpr(bg)) >1",genomesubset=TRUE)
```

I have R studio, would it be possible to download an older version of R and switch to it temporarily to use rowVars, then switch back to continue the ballgown output analysis?

If so does anyone know what the last version of R rowVars worked on?

Or should I try to find an older version of ballgown, and downgrade my R version? I know there are many functions on bioconductor that do not necessarily work on the latest version of R, so is there a benifit to running older versions of R generally when working with these packages?

Huh, must be! I tried to get it as part of matrixstats but that didnt work, this download did. Thanks a bunch! This was a real help.

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