Good morning, I would like to know if is possible somebody can help me with this please: I would like to calculate the median of grouped data, this is an example:
ID PM adt_01 25.255 adt_01 225.36 adt_01 14.2325 adt_02 15 adt_02 12.3 adt_03 15.2 adt_03 148.3 adt_03 25.5 adt_03 14.25 I need the median of adt_01, 02 and 03 , I know that I have to split first my data and then ask for the median but the code I have is not working. Thank you very much if you can help me with the code maria ______________________________________________ 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.