r - Count sequences of numbers rowwise -


i have following dataframe 0, 1, , nas ids e on 1 year period:

dat <- data.frame(  id = c("a", "b", "c", "d", "e"),  jan = c(0, 0, na, 1, 0),  feb = c(0, 1, 1, 0, 0),  mar = c(0, 0, 1, 0, 1),  apr = c(0, na, 0, na, 1),  may = c(0, na, 0, 0, 0),  jun = c(0, 0, 0, 0, 0),  jul = c(0, 0, 0, 0, 1),  aug = c(na, 0, 0, 1, 1),  sep = c(na, 0, 0, 1, na),  okt = c(na, 0, 0, 0, na),  nov = c(na, 0, 0, 0, 1),  dez = c(na, 0, 0, 0, 0) )  > dat   id jan feb mar apr may jun jul aug sep okt nov dez      0   0   0   0   0   0   0  na  na  na  na  na    b   0   1   0  na  na   0   0   0   0   0   0   0    c  na   1   1   0   0   0   0   0   0   0   0   0    d   1   0   0  na   0   0   0   1   1   0   0   0    e   0   0   1   1   0   0   1   1  na  na   1   0

i count number of 1s each id on 1 year period, following conditions need met:

  • the first occurrence of 1 counted 1
  • nas should treated 0s
  • a second occurrence of 1 counted, if preceded six or more 0s/nas

in example, count be:

> dat    id jan feb mar apr may jun jul aug sep okt nov dez     count  1    0   0   0   0   0   0   0  na  na  na  na  na      => 0  2  b   0   1   0  na  na   0   0   0   0   0   0   0      => 1  3  c  na   1   1   0   0   0   0   0   0   0   0   0      => 1  4  d   1   0   0  na   0   0   0   1   1   0   0   0      => 2  5  e   0   0   1   1   0   0   1   1  na  na   1   0      => 1

the function should applied rowwise in form of apply(dat[, -1], 1, my_fun) , return vector containing count (i.e. 0, 1, 1, 2, 1). have idea how achieve this?

how using rollapply zoo package:

library(zoo) library(magrittr)  myfun <- function(y, pattern = c(0,0,0,0,0,0,1)){     y[is.na(y)] <- 0 # account both 0s , nas     first <- sum(y[1:(length(pattern)-1)])!=0     rest  <- y %>% as.numeric() %>% rollapply(7, identical, pattern) %>% sum     return(first+rest) }  apply(dat[,-1],1,myfun)  [1] 0 1 1 2 1

the rollapply part match sequence of 6 0s followed 1 in each row.

the thing left account 1s in first 6 months (which want count won't matched rollapply). done first row of myfun.


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