Centering labels on X-axis

Hello,

Your working code needs a plot first:

plot(1:5, xaxt = "n")

And there's no 'text' argument to axis(). As for the centering of axis 
labels, they're centered on my graphics device. Exactly what is 
happening to yours?

 > sessionInfo()
R version 2.15.1 (2012-06-22)
Platform: i386-pc-mingw32/i386 (32-bit)

locale:
[1] LC_COLLATE=Portuguese_Portugal.1252 LC_CTYPE=Portuguese_Portugal.1252
[3] LC_MONETARY=Portuguese_Portugal.1252 LC_NUMERIC=C
[5] LC_TIME=Portuguese_Portugal.1252

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods base

other attached packages:
[1] ggplot2_0.9.2 igraph_0.6-2

loaded via a namespace (and not attached):
  [1] colorspace_1.1-1   dichromat_1.2-4    digest_0.5.2 fortunes_1.5-0
  [5] grid_2.15.1        gtable_0.1.1       labeling_0.1 MASS_7.3-21
  [9] memoise_0.1        munsell_0.3        plyr_1.7.1 proto_0.3-9.2
[13] RColorBrewer_1.0-5 reshape2_1.2.1     scales_0.2.2 stringr_0.6.1
[17] tools_2.15.1

Hope this helps,

Rui Barradas
Em 19-10-2012 15:39, YAddo escreveu:

Dear all:
I am trying to center labels on my plot with not much success. I have tried
text(), mtext() but it's not working. I think I am using the wrong function
for  my task.

  Any help will be appreciated.

My working codes.
axis(1,
at=c(1,2,3,4,5),font.lab=2,cex.axis=1.5,cex.lab=3,label=c("W0","CWH2","CWHmc","CH2","CHmc")
,text=c(1.5,2.5,3.5,4.5,5.5))

Many thanks in advance
YA



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Dear all:
I am trying to center labels on my plot with not much success. I have tried
text(), mtext() but it's not working. I think I am using the wrong function
for  my task.

  Any help will be appreciated.

My working codes.
axis(1,
at=c(1,2,3,4,5),font.lab=2,cex.axis=1.5,cex.lab=3,label=c("W0","CWH2","CWHmc","CH2","CHmc")
,text=c(1.5,2.5,3.5,4.5,5.5))

Hi YAddo,
Perhaps the most common problem with getting the positions of axis 
labels right occurs with barplots. The bars in the standard "barplot" 
function are not centered on integer values, but the centers are 
returned from the function:

barpos<-barplot(...)
axis(1,at=barpos,...)

Is this the problem you are having?

Jim

Thanks Jim and Rui.

My apologies, i did not give enough info on my plot.

I am using : plot(x,y)  for a line plot.  I want to center the labels on the
x-axis for each tick.

Thanks.





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Thanks Jim and Rui.

My apologies, i did not give enough info on my plot.

Nor do you even  now. Offer a data example.

I am using : plot(x,y)  for a line plot.  I want to center the labels on the
x-axis for each tick.

Code. We want code.

David Winsemius, MD
Alameda, CA, USA

Thanks Jim and Rui.

My apologies, i did not give enough info on my plot.

I am using : plot(x,y)  for a line plot.  I want to center the labels on the
x-axis for each tick.

Hi YAddo,
This is another guess, that you have more ticks than labels because they 
are closely spaced. Have a look at the staxlab function in the plotrix 
package.

Jim