Splitting a file name into name,extension

Question

I have the name of a file like this: name1.csv and I would like to extract two substrings of this string. One that stores the name1 in one variable

Answer 1

Using regular expression, you can do this for example

regmatches(x='name1.csv',gregexpr('[.]','name1.csv'),invert=TRUE)
[[1]]
[1] "name1" "csv"