R help - Jun 2004 - cross table

Hi,

I have a dataframe with 3 columns: month (1 to 12), length and length class.

I'm trying to make a cross table with the counts of lengths per length class
and month. I don??t have all classes per month.

    | 1 2 3 ...
-------------
120 | 0 1 0
150 | 5 6 0
170 | 3 0 7
...

I have already tryed many commands, without success - unfortunately.

May someone help me? Thanks in advance!

Antonio Olinto



-------------------------------------------------
WebMail Bignet - O seu provedor do litoral
www.bignet.com.br

PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html

	  What have you tried?  In particular, have you tried "table"?  Dates
and times may present difficulties, but help.search('table') in R 1.9.1
alpha under Windows 2000 just produced a number of options.

	  hope this helps.  spencer graves    

Antonio Olin wrote:
>Hi,
>
>I have a dataframe with 3 columns: month (1 to 12), length and length class.
>
>I'm trying to make a cross table with the counts of lengths per length
class
>and month. I don??t have all classes per month.
>
>    | 1 2 3 ...
>-------------
>120 | 0 1 0
>150 | 5 6 0
>170 | 3 0 7
>...
>
>I have already tryed many commands, without success - unfortunately.
>
>May someone help me? Thanks in advance!
>
>Antonio Olin
>
>
>
>-------------------------------------------------
>WebMail Bignet - O seu provedor do litoral
>www.bignet.com.br
>
>______________________________________________
>R-help at stat.math.ethz.ch mailing list
>https://www.stat.math.ethz.ch/mailman/listinfo/r-help
>PLEASE do read the posting guide!
http://www.R-project.org/posting-guide.html
>  
>