search for: coardiantes

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2003 Aug 15
2
help with Tukey Mean-Difference Plot
...ld show me the difference betweenthe two values. I don't have the literature how the plot gets constructed, but my understanding from http://www.itl.nist.gov/div898/software/dataplot/refman1/auxillar/meandiff.htm is that the first from each distribution a qq plot is constructed and than the coardiantes of the qq-plot are transformed according the formula x=x+y/2 and y=x+y. I tried this with tmd(xyplot(a ~ b| c, data=data)) with a and b holding my log10 transformed numerical values, and c the condition. However I think I don't get a Tukey Mean-Difference plot. It looks to me that only...