How I should remove digits with other characters (eg:100g) in R

Question

The chips column table "productWords" looks like this: "Natural Chip SeaSalt175g" "CCs Nacho Cheese 175g"
"Smiths Crinkle Cut Chips Chicken 170g" "Smiths Chip Thinly S/Cream&Onion 175g"

I hope to remove the digits and special characters, so I use productWords$Chip <- str_replace_all(productWords$Chip,"[:digit:]", "") AND str_replace_all(productWords$Chip, "[[:punct:]]", " ")

but what I want to remove is not just the digits number but "175g".

question from:https://stackoverflow.com/questions/65646202/how-i-should-remove-digits-with-other-characters-eg100g-in-r

Answer 1

With sub you can search for a pattern and replace it (or remove it by replacing it with an empty string). The pattern in your example would be "[0-9]+g". This corresponds to any digit one or more times followed by the character g.

productWords$Chip <- sub(pattern = "([0-9]+g)|[[:punct:]]", replacement = "", x = productWords$Chip)