[R] Help in getting info from a DataFrame

[David Winsemius]

On Jan 30, 2011, at 5:27 PM, ADias wrote:

> dados<- 
> data 
> .frame 
> (Store 
> = 
> c 
> ("Setubal 
> ","lx 
> ","Aveiro 
> ","Coimbra 
> ","Aveiro","Evora","Aveiro","Coimbra","Setubal"),Prod=c("Bloco
> Desenho","Bloco
> Desenho 
> ","Tinteiro 
> ","Régua 
> ","Lapiseira 
> ","Regua 
> ","Tinteiro","Lapiseira","Lapiseira"),qtd=c(2,1,2,1,3,1,1,1,1))


See if this is a more useful approach:

 > lapsales <- dados[dados$Prod=="Lapiseira",  ]
 > lapsales[which.max(lapsales[ , "qtd" ]), "Store"]
[1] Aveiro
Levels: Aveiro Coimbra Evora lx Setubal

-- 
David Winsemius, MD
West Hartford, CT