r - Record variable to a dummy variable using weekdays -

i have variable starting monday lists each date 1-7. want change weekday vs. weekend, 0-1 respectively create dummy variable. know how one, can't figure out how include 6 , 7 in iterations of code.

for example, put following:

flights$dayweek <-factor(ifelse(as.numeric(flights$dayweek)==6, 1,0)) 

my intent above code find anywhere says 6 & 7, replace 1 , else 0 variable dayweek in flights data set. problem above 6 , not 7. don't know how include 7 in data set. have tried:

flights$dayweek <-factor(ifelse(as.numeric(flights$dayweek)==6:7, 1,0)) flights$dayweek <-factor(ifelse(as.numeric(flights$dayweek)==c(6,7), 1,0)) 

and have looked @ other common dummy variables topics, seem simple 1 0 male/female , know how that. greater 5 function? sample data below:

schedtime carrier deptime dest distance date dayweek daymonth delay 1700      ru      1651    wer  213      1401    4       1     ontime 1800      ru      1402    ewr  199      1401    6       1     delayed 

use %in% operator test inclusion in vector.

# using example dataset flights <- data.frame(dayweek = rep(1:7, 2), "flight" = letters[1:14]) flights$dayweek <-factor(ifelse(as.numeric(flights$dayweek) %in% c(6, 7), 1,0))  > flights    dayweek flight 1        0      2        0      b 3        0      c 4        0      d 5        0      e 6        1      f 7        1      g 8        0      h 9        0      10       0      j 11       0      k 12       0      l 13       1      m 14       1      n