You need some caution with Brian's solution as it
depends on the matrix being in the same order as
the factors in the data frame.
a <- data.frame(cbind(x=c('a','a','a','b','c'),
y=c('a','b','c','d','e'),z=c(1,2,3,4,5)))
mm <- matrix(0,5,5)
colnames(mm) <- c('a','b','c','d','e')
rownames(mm) <- c
On Thu, 28 Jun 2007, Andrej Kastrin wrote:
> Dear all,
>
> I have a data frame
> a <- data.frame(cbind(x=c('a','a','a','b','c'),
> y=c('a','b','c','d','e'),z=c(1,2,3,4,5)))
> > a
> x y z
> 1 a a 1
> 2 a b 2
> 3 a c 3
> 4 b d 4
> 5 c e 5
>
> and a matrix
> mm <- matrix(0,5,5)
> colnames(mm) <- c('
Dear all,
I have a data frame
a <- data.frame(cbind(x=c('a','a','a','b','c'),
y=c('a','b','c','d','e'),z=c(1,2,3,4,5)))
> a
x y z
1 a a 1
2 a b 2
3 a c 3
4 b d 4
5 c e 5
and a matrix
mm <- matrix(0,5,5)
colnames(mm) <- c('a','b','c','d','e')
rownames(mm) <- c('a','b','c','d','e')
> mm
a b
