Hi List Members, This is a very stupid problem but I am not able to know what the solution can be. I am trying to run a query like below
*Program Flow :* 1. a <- data.frame(table( cut( Sys.time() + seq(0,82800,3600), "60 mins") )) # It generates the 60 minute intervals. Thanks David 2. b <- data.frame(a$Var1) # To extract only First Column i.e. Var1 3. class(b) # checking class 4. b[1:1,1:1] # Trying to access the first row and the problem starts. 2. b <- Sys.time()+ 5*60 # 5 minute interval increase 3. ifelse(b[1:1,1:1] *"<" *Sys.time()+5*60,rnorm(1,0,5),Sys.sleep) Error: unexpected string constant in "ifelse(b[2:2,1:1] "<" My only aim is to run "ifelse" for checking whether the program is running or not.Please help *Data :* a <- structure(list(Var1 = structure(1:24, .Label = c("2012-09-19 16:40:00", "2012-09-19 17:40:00", "2012-09-19 18:40:00", "2012-09-19 19:40:00", "2012-09-19 20:40:00", "2012-09-19 21:40:00", "2012-09-19 22:40:00", "2012-09-19 23:40:00", "2012-09-20 00:40:00", "2012-09-20 01:40:00", "2012-09-20 02:40:00", "2012-09-20 03:40:00", "2012-09-20 04:40:00", "2012-09-20 05:40:00", "2012-09-20 06:40:00", "2012-09-20 07:40:00", "2012-09-20 08:40:00", "2012-09-20 09:40:00", "2012-09-20 10:40:00", "2012-09-20 11:40:00", "2012-09-20 12:40:00", "2012-09-20 13:40:00", "2012-09-20 14:40:00", "2012-09-20 15:40:00"), class = "factor"), Freq = c(1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L)), .Names = c("Var1", "Freq"), row.names = c(NA, -24L), class = "data.frame") *Session Info * R version 2.15.1 (2012-06-22) Platform: i386-pc-mingw32/i386 (32-bit) locale: [1] LC_COLLATE=English_United States.1252 [2] LC_CTYPE=English_United States.1252 [3] LC_MONETARY=English_United States.1252 [4] LC_NUMERIC=C [5] LC_TIME=English_United States.1252 attached base packages: [1] stats graphics grDevices datasets utils [6] methods base other attached packages: [1] rcom_2.2-5 rscproxy_2.0-5 loaded via a namespace (and not attached): [1] tools_2.15.1 Best Regards, Bhupendrasinh Thakre *Disclaimer :* The information contained in this communication is confi...{{dropped:11}} ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.