On Jan 27, 2012, at 9:47 AM, gianni lavaredo wrote:
Dear researchers
I wish to plot a box plot without the mean line
It's not at the mean.
(the black line) and the i
wish a full line for the standard deviation
And the boxplot whiskers are not at the standard deviations, either.
It is a non-parametric plot.
?boxplot
?boxplot.stats
?fivenum
There are many requests over the years from people with varying
degrees of knowledge about what box-and-whisker plots really are ....
and with posted responses to requests for plotting results that meet
their desired preconceptions about what boxplots should be (but
aren't). You should exercise (or build) your searching skills. (This
is practically a plotting FAQ.)
This is an example
mytest <-
c(2.1,2.6,2.7,3.2,4.1,4.3,5.2,5.1,4.8,1.8,1.4,2.5,2.7,3.1,2.6,2.8)
boxplot(mytest)
Try putting in a large number in that vector, say a single 500, print
the mean and standard deviations and then see what happens to the
boxplot. It won't be as you expect.
--
David Winsemius, MD
West Hartford, CT
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