Hi People,
Does anyone have a good solution for this problem:
a database called DB.
index <- sample(1:nrow(DB), size=0.2*nrow(BD))
test <- DB[index,]
train <- DB[-index,]
One of the variables in this database contais a target variable with two
values 0 and 1.
Imagine now that i want to constraint the test data frame so the 20% of the
size of "test" has 50% of DB$target.
Imagine: n=100
DB$target = { 0=80
1=20}
test=20 and contain 10 random values of DB$target=1 and 10 random values of
DB$target=0.
Many Thanks,
Eliano
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