[R] "Simplifying" matrices ?

[Jacques VESLOT]

unique(x[,-2])

Sérgio Nunes a écrit :

>Hi again,
>
>the previous answers were great. I was able to do what was planned.
>Now, I would like to do the following to a matrix:
>
>|| year | event | team | total ||
>
>where I can have multiple "event" per "team", but each "team" only has
>a "year" and a "total". Thus, this table has multiple lines for the
>same "team" where only the "event" changes.
>Considering this, how can I output this:
>
>|| year | team | total ||
>
>where each "team" occurs only once, and the "event" was discarded.
>
>Hope I made myself clear.
>Thanks in advance.
>
>This is a great mailing list.
>
>Regards,
>Sérgio Nunes
>
>______________________________________________
>R-help at stat.math.ethz.ch mailing list
>https://stat.ethz.ch/mailman/listinfo/r-help
>PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
>
>  
>