From: Martin Maechler <maechler_at_stat.math.ethz.ch>

Date: Fri 02 Dec 2005 - 03:16:07 EST

R-help@stat.math.ethz.ch mailing list

https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Fri Dec 02 03:25:59 2005

Date: Fri 02 Dec 2005 - 03:16:07 EST

Boxplots were invented by John W. Tukey and I think should be counted among the top "small but smart" achievements from the 20th century. Very wisely he did *not* use mean and standard deviations.

If you want the mean +/- sd plot, do *not* misuse boxplots for them, please!

Martin Maechler, ETH Zurich

>>>>> "Evgeniy" == Evgeniy Kachalin <ka4alin@yandex.ru>

>>>>> on Thu, 01 Dec 2005 19:04:47 +0300 writes:

Evgeniy> Hello to all users and wizards. Evgeniy> I am regulary using 'boxplot' function or its analogue - 'bwplot' from Evgeniy> the 'lattice' library.

[there's the lattice *package* !]

Evgeniy> But they are, as far as I understand, totally Evgeniy> flawed in functionality: they miss ability to select what they would Evgeniy> draw 'in the middle' - median, mean. What the box means - standard Evgeniy> error, 90% or something else. What the whiskers mean - 100%, 99% or Evgeniy> something else. Evgeniy> Is there any way to realize it? Or is there any other good data Evgeniy> visualization function for comparing means of various data groups? Evgeniy> Ideally I would like to have a bit more customised function for doing Evgeniy> that. For example, 'boxplot(a~b,data=d,mid='mean').

Evgeniy> --

Evgeniy> Evgeniy, ICQ 38317310.

R-help@stat.math.ethz.ch mailing list

https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Fri Dec 02 03:25:59 2005

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