[R] Using split and then unsplit

[anna]

Hello everyone,
I use the split function splitting with the f function on a 3 columns and
more than 100 000 rows data frame. Once it's split I have a list of data
frames still with 3 columns and n rows. I manipulate those list elements and
get a list of data frames still with 3 columns but less rows. So when I
unsplit it, I get an error as I use the same factor function I used to split
( f in the help split page) I guess because the number of rows changed. Do I
need to create a new f function to be able to unsplit or is there another
way to unsplit those data frames and rbind them? Thank you!

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Anna Lippel
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