hello there, I'm an R beginner and got plunged into this. I guess my attempts are hopeless so far, so I won't even show them. I want to write a loop, which prints all erroneous values. My definition of erroneous: If the current counts (partridge counts in a hunting district) differ from last years counts by more than 50 percent and absolut values differ by more than 5 animals I want r to print these values.
I have a grouping variable District "D", the year "Y" and the counts "C". example table: D Y C a 2005 10 a 2006 0 a 2007 9 b 2005 1 b 2006 0 b 2007 1 c 2005 5 c 2006 NA c 2007 4 Although the difference in a and b is 100 percent I would doubt a's population breakdown, whereas District b is credible. To confuse things I want the loop to skip missing values and instead look at the year after. Any help is very much appreciated! Thanks, Katrin ______________________________________________ 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.
