CODEWITHSUNDEEP
r
Kavipriya
Kavipriya

Reputation: 441

which() function in R

I have a data frame(A) of size (92047x2) and a list(B) of size (1829). I want to create a new data frame with all rows of A whose first column value is present in B.

How to use which()? Or any other good way to approach this?

All the values are in form of character. (Eg. "Vc2345")

Upvotes: 0

Views: 1405

Answers (1)

cyberj0g
cyberj0g

Reputation: 3787

You can do it like that:

dfA=data.frame(C1=sample(1:92047), C2=sample(1:92047))
listB=list(sample(1:1829))
dfAinB=dfA[which(dfA$C1 %in% unlist(listB)),]
str(dfAinB)

Upvotes: 3

Related Questions