Hello
Hello
I have a data frame, x, holding 5 persons answering the question which
cars they have used:
# the data frame
x <- as.data.frame(
matrix(
c('BMW', '', '',
'Mercedes', 'VW', '',
'Skoda', 'VW', 'BMW',
'', '', '',
'VW', 'Skoda', ''
),
ncol=3,
dimnames=list(
NULL,
paste( 'v', 1:3, sep='' )
)
)
)
How do I transform this data frame to a data frame stating whether they
have used the presented car:
BMW Mercedes VW Skoda
1 T F F F
2 F T T F
3 T F T T
4 F F F F
5 F F T T
My idea was to first find all levels by:
v <- unique(unlist(lapply(x, levels)))
But then I am stuck.
Thanks for help, *S*
--
Sascha Vieweg, saschav...@gmail.com
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