Filtering a dataframe in a loop and apply a function or applying a function on each element of a dataframe (?)

[Sanjmeh]

It is unfortunately not clear yet, to me.
If you would like someone to help, make the representative example clearer.
If you haven't read what a reprex looks like, please go throuth this excellent explanation and use the reprex package to explain your code.

[Video] Reproducible Examples and the `reprex` package

Reproducible Examples and the reprex package Intro Basic usage of reprex Motivation, why use reprex? "Help me help you" Define reprex? Three common ways to use the term. noun, a reproducible example the reprex package. a tool to build R reprexes reprex::reprex(), a function in reprex to make a reprex. When should you use a reprex? reprex installation and setup How do you actually get reprex on your machine? Advanced setup and discussion. Please use advanced features responsibly. Why does the reprex package exist? Anyone who has helped teach R or dealt with github issues, twitter, stack overflow & RStudio community questions knows that helping people diagnose their coding problems c…