[R] cross table

[Spencer Graves]

	  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
>
>
>
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