[R] count - help

[Dieter Menne]

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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