[R] matrix of all difference between rows values

[Rui Barradas]

Hello,

Try the following.

# Create the dataset
Table1 <- matrix(10:6, ncol = 1)
rownames(Table1) <- letters[1:5]
Table1

t(outer(Table1[,1], Table1[,1], `-`))

Hope this helps,

Rui Barradas
Em 10-11-2012 18:32, cleberchaves escreveu:
> Hello all,
> i would like to calculate the difference of all row values and the others
> row values from my matrix (table 1). The output (table 2) would be a matrix
> with input matrix's row names on row names and colums names, thereby the
> difference values among two of the row names could be bether found.
>
> Could someone help me?
>
> Examples:
>
>           Table 1:
>           a         10
>           b         9
>           c         8
>           d         7
>           e         6
>
>
>           Table 2:
>                    a         b         c         d         e
>           a       0        -1        -2        -3        -4
>           b       1        0         -1        -2        -3
>           c        2        1         0        -1         -2
>           d       3        2         1          0         1
>           e       4        3         2          1          0
>
>
>
> --
> View this message in context: http://r.789695.n4.nabble.com/matrix-of-all-difference-between-rows-values-tp4649191.html
> Sent from the R help mailing list archive at Nabble.com.
>
> ______________________________________________
> 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.