Take a look at the "scales" argument in dotpolot.
Maybe you need something like:
position<-exp(-5:0)/(1+exp(-5:0))
dotplot(type~freq/(3027-freq),
scales=list(x=list(log=T,
at=position, lab=round(position, 3))) )
Stefano
>-----Messaggio originale-----
>Da: r-help-bounces at stat.math.ethz.ch
>[mailto:r-help-bounces at stat.math.ethz.ch]Per conto di Michael Kubovy
>Inviato: 14 April 2006 15:29
>A: r-help at stat.math.ethz.ch
>Oggetto: [R] Dotplot x-axis
>
>
>Here's a small dataset:
>
>type <-
c('hierarchical','partial','single','complete','single
>+hierarchical','single+partial','partial+hierarchical','sing
>le+partial
>+hierarchical')
>freq <- c(1455,729,688,65,29,28,16,17)
>lodds <- log(freq/(3027 - freq))
>dotplot(type~lodds)
>
>I would like to have the x-axis have ticks at nice, close
>to equally-
>spaced values, of the proportions rather than at round log-odds
>values, which appear as -5:0. For example: perhaps have ticks at c
>(0.007, 0.02, 0.05, 0.12, 0.27, 0.5), which are approximate
>values of
>exp(-5:0)/(1+exp(-5:0))
>
>Advice?
>_____________________________
>Professor Michael Kubovy
>University of Virginia
>Department of Psychology
>USPS: P.O.Box 400400 Charlottesville, VA 22904-4400
>Parcels: Room 102 Gilmer Hall
> McCormick Road Charlottesville, VA 22903
>Office: B011 +1-434-982-4729
>Lab: B019 +1-434-982-4751
>Fax: +1-434-982-4766
>WWW: http://www.people.virginia.edu/~mk9y/
>
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