Dir.create function in R erases files in parent folders on the computer

Question

For working purpose, I have made a new function which automatically tests whether a folder (with its name specified by its file path) exists or not:

make.dir <- function(fp) {

# If not existing, create a new one
if(!file.exists(fp)) {
make.dir(dirname(fp))
dir.create(fp, recursive = FALSE, showWarnings = FALSE)
} else {

# If existed, delete and replace with a new one  
unlink(fp, recursive = FALSE)
dir.create(fp)
 }
}

An example would be:

make.dir("D:/Work/R/Sample")

this is supposed to create a folder named "Sample" in the parental folder "R" if that folder did not exist, and replace the folder with a new one, if existed.

However, I have only been trying this with the latter case, ie replacing existing folders. Yesterday, I used this code to try to make a folder that did not pre-exist in "Sample" folder (say "Plots"). Instead of creating a folder named "Plots", it detected that the parent folder - "Sample" existed and started to delete every files contained in that folder. Afterwards, it proceeded to delete all of the files in the upper folder - "R" - as well. I had to cancel the code before it deletes my (D:) drive.

It works fine for replacing existing folders, but not with creating new folders. Anyone has any ideas on how to fix the function, or make a new one?

Thanks

Answer 1

As pointed out by @ytk in the comment above, the call for make.dir in the first if statement makes the function go wild. Removing that solved the problem. Thanks, ytk