YouTipR Func Unlist
# R unlist() Function - Flatten List to Vector
[ R Language Examples](#)
The R unlist() function is used to flatten a list into a vector.
When all elements in the list are of the same type, unlist() can convert it into a vector for unified processing.
The syntax of the unlist() function is as follows:
unlist(x, recursive = TRUE, use.names = TRUE)
**Parameter Description:**
* **x** Input list.
* **use.names** Whether to retain element names, defaults to TRUE.
## Example
# Created from a Numeric List
num_list <-list(
group1 =c(1, 2, 3),
group2 =c(4, 5, 6),
group3 =c(7, 8, 9)
)
# Flatten to a Vector
flat <-unlist(num_list)
print("Flattened Vector:")
print(flat)
# Can Be Used for Direct Calculation
print(paste("Sum:", sum(flat)))
print(paste("Mean:", mean(flat)))
# Flattening a Mixed-Type List Converts to Character
mixed_list <-list(a =1, b ="hello", c=3)
flat_mixed <-unlist(mixed_list)
print("Flattening Mixed Types:")
print(flat_mixed)
Executing the above code outputs the following result:
"Flattened Vector:" group11 group12 group13 group21 group22 group23 group31 group32 group33 1 2 3 4 5 6 7 8 9 "Sum: 45" "Mean: 5" "Flattening Mixed Types:" a b c "1" "hello" "3"
[ R Language Examples](#)