[R] How to subset my data and at the same time keep the balance?

[Rui Barradas]

Hello,

See the following example.

x <- matrix(rnorm(2000), ncol = 2)

idx <- sample(nrow(x), 0.7*nrow(x))
x2 <- x[idx, ]
nrow(x2)  # 700

x3 <- x[-idx, ]
nrow(x3)  # 300

Hope this helps,

Rui Barradas
Em 19-11-2012 17:16, Eddie Smith escreveu:
> Hi guys,
>
> I have 1000 rows of a dataset. In my analysis, I need 70% of the data,
> run my analysis and then use the remaining 30% to test my model.
>
> Could anybody kindly help me on this?
>
> Cheers
>
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