[BioC] cursor position on image

Peter Hietz peter.hietz at boku.ac.at
Wed Jan 9 08:08:17 CET 2008


I am using the EBImage package for image display and analysis and want 
to read the cursor (mouse) position on the image. The R-function 
"locator()" would be ideal, but this appears to work only on plots, not 

> a <- Image((0:(w^2))/w^2, c(w,w))
> if ( interactive() ) display(a)
> locator(n = 10, type = "p")
Error in locator(n = 10, type = "p") : plot.new has not been called yet

Is there a similar function that works with dispalyed images ?


Peter Hietz
Institute of Botany
University of Natural Resources 
and Applied Life Sciences
Gregor Mendel-Str.33
1180 Vienna, Austria
tel: +43-1-47654-3154
fax: +43-1-47654-3180
email: peter.hietz at boku.ac.at

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