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meanname
2010 Feb 04
3
strange behaviour of median
During some experimentation in preparing R lessons I encountered this
behaviour which I can not explain fully
mat <- matrix(1:16, 4,4)
df1 <- data.frame(mat)
> mean(df1)
X1 X2 X3 X4
2.5 6.5 10.5 14.5
Expected, documented
> median(df1)
[1] 6.5 10.5
Rather weird, AFAIK there shall not be an issue with data frame at least I
did not find any in help page. I tracked it