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partdf
2009 Jan 20
1
generalizing expand.table: table -> data.frame
...e
library(vcd)
art <- xtabs(~Treatment + Improved, data = Arthritis)
> art
Improved
Treatment None Some Marked
Placebo 29 7 7
Treated 13 7 21
expand.table (above) gives a data frame of sum(art)=84 observations,
with factors
Treatment and Improved.
> artdf <- expand.table(art)
> str(artdf)
'data.frame': 84 obs. of 2 variables:
$ Treatment: Factor w/ 2 levels "Placebo","Treated": 1 1 1 1 1 1 1 1 1
1 ...
$ Improved : Factor w/ 3 levels "Marked","None",..: 2 2 2 2 2 2 2 2 2 2 ...
>
I'...