Скачать или смотреть Extract First or Last n Characters from String in R (3 Examples) | Get Leading & Trailing Chars

How to extract n leading or trailing characters from a string in the R programming language. More details: https://statisticsglobe.com/r-extract...
R code of this video:

x ＜- "this is an example" # Create example character string
x # Print example character string

substr(x, 1, 3) # Extract first three characters

n_last ＜- 3 # Specify number of characters to extract
substr(x, nchar(x) - n_last + 1, nchar(x)) # Extract last three characters

install.packages("stringr") # Install stringr package in R
library("stringr") # Load stringr package

str_sub(x, 1, 3) # Extract last characters with str_sub

str_sub(x, - 3, - 1) # Extract last characters with str_sub

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