[R] plotting derived values not raw

Chuck Cleland ccleland at optonline.net
Fri Feb 9 22:47:29 CET 2007

James Root wrote:
> I am trying to plot the mean and standard error of three separate
> conditions.  For various reasons, I do not have access to the raw data from
> which the mean and error were derived and would like to make error bar plots
> utilizing only the actual mean and standard error values.  Is there a way to
> do this in R?  Thanks for any help in advance.

RSiteSearch("error bars", restrict="function") points to several
packages that will plot errors bars or confidence intervals only from
the summary information.  For example:


mymeans <- rnorm(10)

myerrors <- 1 + .1*rnorm(10)

errbar(1:10, mymeans, mymeans + myerrors, mymeans - myerrors,
main="Error Bars example")

> james
> 	[[alternative HTML version deleted]]
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Chuck Cleland, Ph.D.
NDRI, Inc.
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