`transform!` on a `SubDataFrame`

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1

Hi,

I am trying to do an in-place transformation on a subset of a dataframe.

  1. df_filtered_view = filter(args..., df, view = true)
  2. transform!(df_filtered_view, args...)

However, it is not possible to use transform! on a SubDataFrame. I know I can add the filtering column in the transform! function to do the filtering subject to some condition. However, since my transformation function uses ByRow I thought it would be more efficient to filter and then transform, rather than use ByRow on a bunch on unnecessary rows (the rows that don’t meet the filtering criterion don’t need to be modified).

Any thoughts?

2

transform! on SubDataFrame is supported since version 1.3. Are you sure you’re on the latest version?

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3

Awesome! I will run the update. I’m on 1.2