Comparisons defined not by columns but levels of one column about ggsignif HOT 5 CLOSED

Hi, thanks for your interest in my package.
I am not quite sure what you mean by "comparison by column"?
You can make a plot where the x-axis is a logical value:

library(ggplot2)
library(ggsignif)
ggplot(mpg, aes(x = class== "compact", y = hwy)) +
  geom_boxplot() +
  geom_signif(comparisons = list(1:2))

If I misunderstood your question, could you please provide a reproducible example (what exactly is in the person data frame).

from ggsignif.

Hi,
I have a similar problem.
I have a table where I have qualitative values (0n,1,0-2,2-,2+) in one column and quantitative data in other columns. I would like to show significance over each group of my quailtative values, but I only get the warning

"In wilcox.test.default(c(82.60,100,-5.26,73.33,    : 
cannot compute exact p-value with ties".

Here is my Code so far:

ggplot(I_80_alle_100,aes(group=Bonitur,x=Bonitur,y=Quotient.100,fill=Quotient.100))+
geom_boxplot(outlier.shape=3)+
geom_signif(comparisons=list(group=I_80_alle_100$Bonitur),map_signif=TRUE)`

Do I get the warning because of my quanitative values are between +100 and -100?

from ggsignif.

Thanks a lot for your quick answer.
Even when I run your code (from above), I get the following error message:
"Error: No stat called StatSignif."

Changing geom_signif to stat_signif results in Error: No geom called GeomSignif..

I don't have quite the latest version of R, but ggsignif is "2017-04-26".

platform       x86_64-redhat-linux-gnu     
arch           x86_64                      
os             linux-gnu                   
system         x86_64, linux-gnu           
status                                     
major          3                           
minor          2.2                         
year           2015                        
month          08                          
day            14                          
svn rev        69053                       
language       R                           
version.string R version 3.2.2 (2015-08-14)

from ggsignif.

@wuffi, that is really strange. Could you please try to re-install the package, because it seems that ggplot cannot find the StatSignif object.
If that does not help, you would have to try it on the latest version of R, because I really don't know what else could produce the error.

@Villete, the warnings you get from the wilcox.test are not a problem, they just mean that an approximation had to be used, because the data values where not unique. See this thread for a more detailed discussion.

from ggsignif.

Hi const-ae,
Thanks a lot for your quick answer. Re-installing the package helped and it works now fine!
The package is really helpful and I think there is a need for it.

from ggsignif.