hist in a for loop

Hello
Thanks for reply

I want to compute several histograms in a for loop.I am trying to set the binsize constant in the beginning.

#compute the histograms
  for (i in 1:12)
     {
     binsize <- -20 :20/2

     hist(singlefile$GVC(singlefile$new_id[,i], freq = FALSE,xlab ="Graph i", col = "pink",main ="Example Histogram", ylim = c(-3.0,3.0)))
     singlefile$GVCmin <- min(singlefile$GVC[1])
     singlefile$GVCmin <- min(singlefile$GVC[1])
     x1 <- seq(-3.0,3.0,by=.01)
     lines(x1,dnorm(x1),col ="black")
     }

I tried also this but it does not do anything. I also tried your proposal , but it says that : breaks = binsize  is not allowed.

I think I am totaly far away from that what I want to do with my code .

One single histogram plotting and computing is easy , but if it is in the loop , by the syntax to feed the function with counter i is not working

Thanks
Dizem
Mit freundlichen Gruessen
Best Regards
Dizem Uerek