Conceptual Thinking: How to rerun a section of a script? for data analysis.

In my script I am analyzing a subset of my Data, after I am done with the analysis I would like to select another subset of my data -through my scripted gui- but that would mean going back to the middle of the script and reruning some code. Is there any productive workarounds for this? OR does the 'analysis' section have to be a function to pull this off?

I am attempting of building a system that can go back to the 'front page' and take a new route, that way I don't have to restart my script each time I am ready to analyze a new subset. Just looking for conceptual thinking

Sidenote: is there a way to code in delimiters/data style -column vectors for example- into uiimport?? because it does not work as well as the built in Data import tool???

Thanks in advance!