Displaying 1 result from an estimated 1 matches for "reconstruirlo".
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reconstruir
2014 Mar 12
2
Frecuencia absoluta acumulada por individuo y por
Por si tienes especial interés en utilizar sqldf:
todos <- sqldf(
"select distinct a.ID,b.YEAR
from dt a , dt b;")
suma <- sqldf(
"select ID,YEAR,sum(CANTIDAD) as CANTIDAD
from dt
group by ID,YEAR;")
todos <- sqldf(
"select a.ID,a.YEAR, CANTIDAD
from todos a left join suma b
on a.ID = b.ID and a.YEAR = b.YEAR
group by a.ID,a.YEAR;")
todos$CANTIDAD =