Merging Files and Grouping by several variables

I have three data files that separate brain regions by hemisphere. What code can I use to merge multiple files to combine their data and then group by age/gender:

region 1 male 10-15 years "data average"
region 1 male 16-20 years "data average"
region 1 female 10-15 years "data average"
region 1 female 16-20 years "data average"

I don't see how we can give you a detailed answer without knowing the structure of the three files.
Are you able to load the files, even as unmerged ?
if so can you make a reprex from the 3 ?
Please have a look at this guide, to see how to create one:

This topic was automatically closed 21 days after the last reply. New replies are no longer allowed.

If you have a query related to it or one of the replies, start a new topic and refer back with a link.