I have a simple 1 way anova coded like summary(ANOVA1way <- aov(Value ~ WellID, data = welldata))
How can I use the BY function to do this ANOVA for each group using another variable in the dataset?? I tried coding it like this, but it doesn't seem to work. summary(ANOVA1way <- by(welldata, Analyte, function(x) aov(Value ~ WellID, data = welldata))) In SAS I would code it like this: Proc sort data=welldata; by analyte; run; Proc glm data=welldata; by analyte; class wellid; model value = wellid; run; Any suggestions??? -- View this message in context: http://www.nabble.com/Running-an-ANOVA-with-a-BY-tp25645413p25645413.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ 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.
