[R] data.frame handling
Michela Cameletti
michela.cameletti at unibg.it
Mon Mar 19 23:46:20 CET 2007
Dear R-users,
I have a little problem that I can't solve by myself.
I have a data frame with 2 factors and 8 observations (see the following
code):
y <- c(1,1,1,2,2,3,3,3)
y <- factor(y)
levels(y) <- c("a","b","c")
x <- c(1,2,3,1,2,1,2,3)
x <- factor(x)
levels(x) <- c("x","y","z")
X <- data.frame(factor1=x,factor2=y)
and the final result is
factor1 factor2
1 x a
2 y a
3 z a
4 x b
5 y b
6 x c
7 y c
8 z c
>From the above data I'd like to obtain the following matrix:
a b c
x 1 1 1
y 1 1 1
z 1 0 1
Do you have any advice? Can you help me please?
Thank you in advance,
Michela
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