[R] help for barchart(lattice)

Prof Brian D Ripley ripley at stats.ox.ac.uk
Tue Jul 1 16:23:48 CEST 2003

On Tue, 1 Jul 2003, Erwan BARRET wrote:

> I'd like to plot coefficients from glm result. with barchart,
> coefficients are ordered by the names of factors and I'd like to order
> them by values (or abs(values)).

You need to set up a factor for the grouping you want: the plot order is
along the levels of the grouping factor.  Take a look at the barchart
example for barley: neither year nor site are in alphabetical order.

> to do that, I've ordered the vector of coefficients but it's plotting the
> same thing.

An implicit call to factor will use alphabetical order, so use an explict

Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272860 (secr)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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