rdataframedeployr

R edit subset of data frame and override original row-values

I have a dataframe, where I extract a certain subset:

tmp <- mtcars |> select(disp, hp)

then I make some data manipulation

tmp$disp <- tmp$disp*0
tmp$hp <- tmp$hp*2

Now I want to reintegrate the changes into the original How?

Of course I could work on the original df in the first place but I just want to know how to replace all values from a df by a subset.

I want to keep the order of the column names and if possible I don't want to use any index. I also assume there are use cases where the select query is long.

Solution

  • answer is:

    mtcars <- mutate(mtcars, tmp)

    edit: add this solution, which could be more intuitive

    newdf <- mtcars |> mutate(tmp)