In R, you can check if a directory exists using the `file.exists()` function. This function takes a directory name as its argument and returns a logical value. If the directory exists, the function returns `TRUE`; otherwise, it returns `FALSE`.
For example, the following code checks if a directory named `data` exists:
if (file.exists("data")) {
# The directory exists
} else {
# The directory does not exist
}
If the directory does not exist, you can create it using the `dir.create()` function. This function also takes a directory name as its argument.
For example, the following code creates a directory named `data` if it does not already exist:
if (!file.exists("data")) {
dir.create("data")
}
The `if()` statement in this code first checks if the directory exists. If it does not exist, the `dir.create()` function is called to create the directory.
Here is an example of how to use these functions to check for and create a directory named `data` in R:
if (!file.exists("data")) {
dir.create("data")
}
This code will first check if the directory `data` exists. If it does not exist, the `dir.create()` function will be called to create the directory. If the directory already exists, the `dir.create()` function will not do anything.
