Edit Question - KnowledgeHub

Title Body

I have a keyword (e.g. 'green') and some text ("I do not like them Sam I Am!"). I'd like to see how many of the characters in the keyword ('g', 'r', 'e', 'e', 'n') occur in the text (in any order). In this example the answer is 3 - the text doesn't have a G or R but has two Es and an N. My problem arises where if a character in the text is matched with a character in the keyword, then it can't be used to match a different character in the keyword. For example, if my keyword was 'greeen', the number of "matching characters" is still 3 (one N and two Es) because there are only two Es in the text, not 3 (to match the third E in the keyword). How can I write this in R? This is just ticking something at the edge of my memory - I feel like it's a common problem but just worded differently (sort of like sampling with no replacement, but "matches with no replacement"?). E.g. keyword <- strsplit('greeen', '')[[1]] text <- strsplit('idonotlikethemsamiam', '')[[1]] # how many characters in keyword have matches in text, # with no replacement? # Attempt 1: sum(keyword %in% text) # PROBLEM: returns 4 (all three Es match, but only two in text) More examples of expected input/outputs (keyword, text, expected output): 'green', 'idonotlikethemsamiam', 3 (G, E, E) 'greeen', 'idonotlikethemsamiam', 3 (G, E, E) 'red', 'idonotlikethemsamiam', 2 (E and D)

Tags (comma-separated) Cancel