[R] Legend in plot: symbol for mean and standard deviation

Uwe Ligges ligges at statistik.uni-dortmund.de
Mon Feb 24 18:52:03 CET 2003

Marco Kienzle wrote:
> Dear list,
> I am facing the following problem with the legend of a plot that display
> the mean and variance of a measurement y as a function of x, the mean
> being represented by a dot and the variance by a vertical line.

At least for me the latter does not appear to be "that common" ...

> My problem is that I am unable to display the symbol (dot + vertical
> line) in the legend.
> any help is welcome,
> thanks
> marco

Does the following do what you are looking for?

  legend(..., c("y.", "y|"))
  legend(..., expression(y[.], y["|"]))

Uwe Ligges

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