在R或Python中模糊匹配两列

Question

We all know how to match a string in a vector using fuzzy method like to find a string "adam" in a vector like A <- c("Madam", "adam", "Lizzy", "Paul").

We can do a grep, grep("adam", A) and we get the index of the elements matching

How to match two vectors like this using fuzzy method?

For example, I have two vectors A <- c("007996", "12390", "09123") and B <- c("7996", "9823", "9123") . I have to perform a fuzzy match between A and B so that I get the index of matching elements in A, in this case 1 3

as 7996 is present in 00796 and 9123 is present in 09123

I tried performing grep(B, A) , but R is throwing an error stating that it will consider only the first element in B, as the matching pattern is more than one on length

Can anyone please suggest a way to do this in R without using a FOR Loop.

The two vectors may not be of same size.

Thanks in advance

Answer 1

If it's only a matter of leading "0" you can do:

A <- c("007996", "12390", "09123")
B <- c("7996", "9823", "9123")

which(as.numeric(A) %in% as.numeric(B)) 
# [1] 1 3

# or here just which(as.numeric(A) %in% B)

Or maybe :

which(as.numeric(A) == as.numeric(B))
# [1] 1 3

It's not clear to me if you're looking for pairwise matches or not.