[R] id & filter problems in data.frame

[Christian Schulz]

Hi,
a questionaire data-set with more than one row for one Person make
me problems.

(1) i want create a function which count the used
row for the relevant id !
example:  
id  c.row
1    1
1    2
1    3
2    1
2    2
4    1
4    2
4    3
4    4
4    5

(2)  i have got a problem to filter & analyse , because the filter 
criteria is unlucky
a row above or under the ratings which i would like to analyse !

Thanks for any suggestions/starting point
Christian Schulz





Metrinomics GmbH
Fon: +49 (0)30  69 51 71 - 16
Fax: +49 (0)30  69 51 71 - 33
mailto:c.schulz at metrinomics.de
http://www.metrinomics.de









-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the "body", not the subject !)  To: r-help-request at stat.math.ethz.ch
_._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._