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...ls and now I would like to put text to each level in the stacked barplot. However, it seems that the code that I am using is not placing the text at the correct hight (centered at each fill) in the barplot. Any suggestions to improve the code to make it work? barchart(FREQ ~ VISIT |which*as.factor(TRTN), data = stuffa,par.strip.text = list(cex = 0.35), groups = RES, xlab="Visit",ylab="Frequency", layout = c(4,2), par.settings=list(superpose.polygon=list(col=colors()[c(636,96,256,92,27,376)])), stack = T, auto.key = list(points = FALSE, rectangles = TRUE, space = "top&quot...

Hello, I need to perform a mixed-model (with nesting) MANCOVA, using Type III sums of squares. I know how to perform each of these types of tests individually, but I am not sure if performing a mixed-model MANCOVA is possible. Please let me know. Erika <>< <>< <>< <>< <>< <>< <>< Erika Crispo, PhD candidate