I found this code through internet and I have a one doubt about this example,
which is
Here you take a 70% random sample considering all the values but what I want is
if the selected sample contains p1,p2 then I want all records of p1,p2 and also
remaining data in some other data frame...like following output
D1
V1 v2
P1 10
P1 3
P1 4
P1 2
P2 30
P2 40
D2
V1 v2
P3 4
P3 1
I hope you understood my doubt.............please help me
Thanks,
Madhu.
> read.table(textConnection(gsub("\\(|\\)", "", var) )) #from prior
posting
V1 V2
1 p1 10
2 p1 3
3 p1 4
4 p2 20
5 p2 30
6 p2 40
7 p3 4
8 p3 1
9 p1 2
> ridxs <- sample(1:nrow(df),floor(0.7*nrow(df)) ) # the 70% sample
row IDs
> df[ridxs,]
V1 V2
5 p2 30
6 p2 40
2 p1 3
7 p3 4
4 p2 20
8 p3 1
>
>
> df[-ridxs,]
V1 V2
1 p1 10
3 p1 4
9 p1 2
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