barbara horta e costa wrote:
>
>
> Sample Season Area Gear Depth
> 1 W 1 5 1
> 2 Sp 1 3 1
> 2 Sp 1 5 1
> 2 Sp 1 11 1
> 2 Sp 1 11 1
>
> Sample: 1:28
> Season: I, P, V, O
> Area: 1:3
> Fishing gear: 1:12
> Depth: 1:8
>
> each variable level is coded with numbers. e.g I have 3 areas and 12 gears
>
>
Here is an example how to create a data frame. If you post again, it is
polite and you will get faster answers when you supply sample data in this
form.
Dieter
n = 100
set.seed(123)
d = data.frame(Sample = sample(1:28,n,TRUE),
Season=sample(c("I","P","V","O"),n,TRUE),
Area = sample(c(1:3,NA),n,TRUE),
Gear = sample(c(1:12,NA),n,TRUE),
Depth = sample(1:8,n,TRUE))
# The real job is rather simple in your case (package reshape is for the
hard work)
xt = xtabs(d,exclude=NULL,na.action=na.pass)
xt
ftable(xt, exclude=NULL,na.action=na.pass)
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