[R] [Q] extracting lower diagonal elements of a matrix

[Jacques VESLOT]

try:
as.vector(as.dist(data))


Taka Matzmoto a écrit :

>Hi R users
>
>I like to extract lower diagonal elements of a matrix in such a way like, 
>data[1,2], data[1,3],
>...., data[5,6] are extracted from a matrix called 'data'
>
>This short script below is what I have written so far.
>
>##########################################
>data <- matrix(rnorm(36,0,1),nrow=6)
>temp<-c()
>for (i in 1:(nrow(data)-1))
>{
>    for (j in (i+1):nrow(data))
>    {
>        temp<-append(temp,data[j,i])
>    }
>}
>##########################################
>
>Is there any function for this?  or is there any elegant way to do this 
>task?
>
>Thanks in advance.
>
>TM
>
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