Box-Cox Transformation

It's extremely difficult to see your code from a picture. Please share codes in a copy-paste friendly form, by copying the code and pasting within a pair of triple backticks like this:

<paste code here>

Regarding your question, since you have the form of the function you desire to create, the easiest option will be to write a custom function. This should be easy, you just need to copy paste a single block within function definition with changing dataframe_name[column_name] or dataframe_name[column_position] to a placeholder variable name which is the argument. Then just use it on different column using lapply, or purrr:map if you are a tidyverse person.

Give it a try and see if it works. If you are getting stuck somewhere, please share your attempt and the issue as a reprex.

Hope this helps.

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