A Method for counting in a sequence, reset by a binary event in R

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A method for creating a variable that sequential counts until an binary event occurs in another vairiable.

Load Libraries

library(dplyr)

Create an data set

The dataset consists of and id, an event that is 0 or 1 %20 of the time, and a panel of "a". The panel was created because I could only find a solution that was grouped by a panel.

id<-1:30
df<-data.frame(id)
df

df1<-df%>%
  mutate(event = sample(1:10, size=30, replace=T))%>%
  mutate(event=if_else(event>8, 1, 0))%>%
  mutate(panel = "a")
df1

This code makes the counter which is reset everytime the event is 1.

df1%>%
  group_by(panel, idx=cumsum(event==1L))%>%
  mutate(counter=row_number())%>%
  ungroup%>%
  select(-idx, -panel)