How to concatenate the results of two commands in R

Question

How we can concatenate the results of two R commands dim(filename) and summary(filename) for the filename in one output file as output.

I tried it but it is not correct:

output <- c(dim(filename), summary(filename)
OR 
output <- dim(filename); summary(filename)

any help is appreciated.

Answer 1

当两个元素的class不同时，最好将其放在一个list以保留class 。

output <- list(dim(filename), summary(filename))