PHERAstar FSX, MARS Data Analysis interpretation in RStudio

R doesn't work that way, is not a spreadsheet, in R you have to be more specific with what you are trying to accomplish, so if you want to plot all your columns in one graph you would have to specify what variables you are going to map to which aesthetic attributes and it depends on the structure of your specific dataset.

If you need more specific help please provide a minimal REPRoducible EXample (reprex). A reprex makes it much easier for others to understand your issue and figure out how to help.

If you've never heard of a reprex before, you might want to start by reading this FAQ: