On 2011-01-10 07:38, David A. wrote:
Dear list, havig the following matrix "Value" "Class" 13.00 1 12.80 1 11.78 1 11.70 2 11.61 2 11.95 2 11.55 2 12.40 3 11.40 1 12.27 1 12.49 3 11.39 4 11.80 4 12.39 3 12.72 3 12.18 3 11.64 3 11.50 4 12.81 4 11.31 4 11.95 2 12.65 2 11.66 2 12.19 3 12.84 1 11.90 1 11.11 4 12.75 4 how can I specify that I want a boxplot of values for class 1 in one box and class 2 and 4 together in another box, without showing class 3?
I hope that's a data frame, not a matrix. Let's call it dat. Form an appropriate factor variable, e.g. dat$grp <- factor(dat$Class) levels(dat$grp) <- list(a=1, b=c(2,4)) boxplot(Value~grp, data=dat) I trust that your real data is more extensive; boxplots for groups of size 7 are not greatly informative. Consider stripchart(). Peter Ehlers
Thanks in advance D.
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