sort a dataframe according to a specfic variable pattern in r

To sort a dataframe according to a specific pattern in a variable, you can use the arrange() function from the dplyr package in combination with a regular expression. Here's an example of how to sort a dataframe by the numbers in a variable called "numbers":

main.r
library(dplyr)

# create example dataframe
df <- data.frame(numbers = c("num_12", "num_1", "num_35", "num_2"))

# sort dataframe by numbers using regular expression
df_sorted <- df %>% arrange(as.numeric(gsub("[^0-9.]", "", numbers)))

# view sorted dataframe
df_sorted
270 chars
11 lines

In this example, we are using the gsub() function to remove all non-numeric characters from the "numbers" variable using the regular expression "[^0-9.]". We then convert the resulting character vector to numeric using the as.numeric() function and sort the dataframe using arrange().