[R] Add blank rows to a dataframe

[arun]

RowSel <-c(0,1,0,1,2,3,0,5,5)
set.seed(24)
DF<- as.data.frame(matrix(sample(1:40,45,replace=TRUE),ncol=5))
RowSel[!as.logical(RowSel)]<-NA
DF[RowSel,]
#     V1 V2 V3 V4 V5
#NA   NA NA NA NA NA
#1    12 11 21 24 30
#NA.1 NA NA NA NA NA
#1.1  12 11 21 24 30
#2     9 25  6 26 26
#3    29 15  4  2 28
#NA.2 NA NA NA NA NA
#5    27 27 30 10 19
#5.1  27 27 30 10 19


A.K.



----- Original Message -----
From: Bert Jacobs <bert.jacobs at figurestofacts.be>
To: r-help at r-project.org
Cc: 
Sent: Saturday, June 8, 2013 7:09 AM
Subject: [R] Add blank rows to a dataframe

Hi,

I have a vector that looks like this:
RowSel <-c(0,1,0,1,2,3,0,5,5)

Now I want to select rows from a specific dataframe DF based on that vector
like this:
SubDF <- DF[RowSel,]

So this works fine, but I was wondering how I could add blank rows add the
locations in the vector where there is a zero:
So the final dataframe should look like this:

SubDF
[1] blank row
[2] row 1
[3] blank row
[4] row 1 
[5] row 2
[6] row 3
[7] blank row
[8] row 5
[9] row 5

Do I have to use a loop for this or does there exist a straight forward
function option.

Thx,
Bert

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