matrix - R Function %*% Explanation -


i have small data frame looks below - 

name,standrewslodge,loyalnine,northcaucus,longroomclub,teaparty,bostoncommittee,londonenemies adams.john,0,0,1,1,0,0,0 adams.samuel,0,0,1,1,0,1,1 allen.dr,0,0,1,0,0,0,0 appleton.nathaniel,0,0,1,0,0,1,0 data <- as.matrix(read.csv("data.csv",row.names=1)) data.t = t(data)

once imported r data set, can transpose using t() function.

post create new data set using 

data.ts = data %*% t(data)

i trying understand %*% function does. numbers come out make no sense.

if has used can pls explain.

thanks,

it's matrix multiplication, see help("%*%").

multiplies 2 matrices, if conformable. if 1 argument vector, promoted either row or column matrix make 2 arguments conformable. if both vectors of same length, return inner product (as matrix).


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