[R] graph question

[Prof Brian Ripley]

On Tue, 12 Oct 2004, Dean Sonneborn wrote:

> I would like to produce a graph which plots a log scale variable on the 
> y-axis but have the tick marks on the y-axis  be the non log transformed 
> values that are round like .5, 1, 2, 3, 4 etc. Has anyone done something 
> like this in the past? How did you implement it in the code?

plot(c(0.5, 5), 1:2, log="x", xaxt="n")
axis(1, at=c(0.5, 1:4))

Take a look at `An Introduction to R' and ?axis.

BTW, please try to use a more precise subject line. Something like
`Adding a custom axis to log-scale plots'?

-- 
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 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595