Hello

I wrote a simple program to modify a boxplot:

<<<

gdsbox <- function(indvar){
boxplot(indvar~gds3lev, 
   main = paste('Boxplot of', substitute(indvar), "for GDS groups"),
   names = c('1', '3', '4, 5, 6'))
}

>>>

If I attach the dataframe gdsgraph, this works fine. However, I've been warned against attach.  When I tried to run this program using 'with', it did not work.

e.g. 

           with(gdsgraph, gdsbox(BReT3T5T))

produced an error that gds3level was not found

but if I try

          with(gdsgraph, boxplot(BReT3T5T~gds3lev))

it works fine.

Similar problems occurred when I tried to use data =

What am I missing?

Thanks

Peter




Peter L. Flom, PhD
Brainscope, Inc.
212 263 7863 (MTW)
917 488 7176 (ThF)



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