[R] R: Dotplot x-axis

[Guazzetti Stefano]

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
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   >
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