CODEWITHSUNDEEP
r
user1440196
user1440196

Reputation: 107

Recognize arbitrary file extensions in R?

I'm writing a function in R that will take the path name of a folder as its argument and return a vector containing the names of all the files in that folder which have the extension ".pvalues".

    myFunction <- function(path) {
        # return vector that contains the names of all files
        # in this folder that end in extension ".pvalues"
    }

I know how to get the names of the files in the folder, like so:

    > list.files("/Users/me/myfolder/")
    [1] "myfile.txt"               
    [2] "myfile.txt.a"     
    [3] "myfile.txt.b"    
    [4] "myfile.txt.a.pvalues"
    [5] "myfile.txt.b.pvalues"

Is there an easy way to identify all the files in this folder that end in ".pvalues"? I cannot assume that the names will start with "myfile". They could start with "yourfile", for instance.

Upvotes: 1

Views: 126

Answers (1)

Justin
Justin

Reputation: 43245

take a look at ?list.files. You want the pattern argument. list.files(path='/Users/me/myfolder', pattern='*\\.pvalues$')

Upvotes: 5

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