Sum of previous rows in a column R

Question

I have table as following

id State
1 True
2 False
3 True
4 False
5 False
6 True
7 True
8 False

I need to count true and false until showed

Answer 1

Does this do what you want?

df$yes <- cumsum(df$State == "True")
df$no <- cumsum(df$State == "False")

Or if you have df$State as a logical vector

df$yes <- cumsum(df$State)
df$no <- cumsum(!df$State)