[R] R dplyr solution vs. Base R solution for the slect column total

[Boris Steipe]

try:

sum(test$count)


B.


On Nov 30, 2014, at 12:01 PM, Muhuri, Pradip (SAMHSA/CBHSQ) <Pradip.Muhuri at samhsa.hhs.gov> wrote:

> Hello,
> 
> I am looking for a dplyr or base R solution for the column total - JUST FOR THE LAST COLUMN in the example below. The following code works, giving me the total for each column - This is not exactly what I want.
> rbind(test, colSums(test))
> 
> I only want the total for the very last column.  I am struggling with this part of the code: rbind(test, c("Total", colSums(test, ...)))
> I have searched for a solution on Stack Oveflow.  I found  some mutate() code for the cumsum but no luck for the select column total.  Is there a dplyr solution for the select column total?
> 
> Any hints will be appreciated.
> 
> Thanks,
> 
> Pradip Muhuri
> 
> 
> ####### The following is from the console - the R script with reproducible example is also appended.
> 
> 
> mrjflag cocflag inhflag halflag oidflag count
> 1        0       0       0       0       0   256
> 2        0       0       0       1       1   256
> 3        0       0       1       0       1   256
> 4        0       0       1       1       1   256
> 5        0       1       0       0       1   256
> 6        0       1       0       1       1   256
> 7        0       1       1       0       1   256
> 8        0       1       1       1       1   256
> 9        1       0       0       0       1   256
> 10       1       0       0       1       1   256
> 11       1       0       1       0       1   256
> 12       1       0       1       1       1   256
> 13       1       1       0       0       1   256
> 14       1       1       0       1       1   256
> 15       1       1       1       0       1   256
> 16       1       1       1       1       1   256
> 17       8       8       8       8      15  4096
> 
> 
> 
> #######################  below is the reproducible example ########################
> library(dplyr)
> # generate data
> dlist <- rep( list( 0:1 ), 4 )
> data <- do.call(expand.grid, drbind)
> data$id <- 1:nrow(data)
> names(data) <- c('mrjflag', 'cocflag', 'inhflag', 'halflag')
> 
> 
> # mutate a column and then sumamrize
>  test <- data %>%
>       mutate(oidflag= ifelse(mrjflag==1 | cocflag==1 | inhflag==1 | halflag==1, 1, 0)) %>%
>       group_by(mrjflag,cocflag, inhflag, halflag, oidflag) %>%
>       summarise(count=n()) %>%
>       arrange(mrjflag,cocflag, inhflag, halflag, oidflag)
> 
> 
> #  This works, giving me the total for each column - This is not what I exactly want.
>    rbind(test, colSums(test))
> 
> # I only want the total for the very last column
> rbind(test, c("Total", colSums(test, ...)))
> 
> Pradip K. Muhuri, PhD
> SAMHSA/CBHSQ
> 1 Choke Cherry Road, Room 2-1071
> Rockville, MD 20857
> Tel: 240-276-1070
> Fax: 240-276-1260
> 
> 
> 	[[alternative HTML version deleted]]
> 
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.