"I was thinking about indexing the variables"
That is a good idea. You should do that.
"or making a for loop with string vectors"
That is most likely a bad idea, because accessing variables from strings is slow, buggy, hard to debug, hard to read... and is strongly discouraged:
Although indexing is likely the best option, another option would be for you to put all of your data into a structure, then you can simply access and pass any of those values by using the fieldnames.
