2

Using df 

date <- c(rep(as.Date("2003-01-05"), 5), rep(as.Date("2004-01-05"), 5), rep(as.Date("2005-01-05"), 5), rep(as.Date("2006-01-05"), 5))
parameter <- rep(c("param_A", "param_B", "param_C", "param_D", "param_E"), 4)

df <- data.frame(date, parameter)
df$year <- year(df$date)

How can I remove param_A for 2003 but keep it for all other years?

shiny
  • 2,920
  • 8
  • 28
  • 69

1 Answers1

8

We can try with filter

df %>% 
    filter(!(parameter=="param_A" & year == 2003))
akrun
  • 674,427
  • 24
  • 381
  • 486