IN r, how to combine the summary together

Question

say i have 5 summary for 5 sets of data. how can i get those number out or combine the summary in to 1 rather than 5

       V1               V2               V3          


        

Answer 1

You can convert the summary output into a matrix and then bind them:

a <- 1:50
b <- 3:53 
c <- rnorm(500)
cbind(as.matrix(summary(a)), as.matrix(summary(b)), as.matrix(summary(c)))

Alternatively, you can combine them into a list and use an apply function (or plyr):

library(plyr)
ldply(list(a, b, c), summary)