Re: [R] how to loop through dataframe objects in environment

This advice works best when you use the lapply function to load your data frames to begin with. That way your like-structured data frames are grouped into one list that you can loop through without complicated use of get and assign. dtadir <- "mydatadir" fnames <- list.files( dtadir ) dtalist <

Re: [R] how to loop through dataframe objects in environment

Hi Stephen, Try out lapply(). It would help you loop through all data frames and sum. Regards, Vikash On Thu, Oct 16, 2014 at 1:58 AM, Stephen HK Wong wrote: > Dear All, > > I have many 50 objects they are all dataframes. Each dataframe has many > rows and four column. I simply want to do an