you can use indexing, e.g.,
mat <- matrix(rnorm(20), 4, 5)
mat
mat[rep(1:nrow(mat), 3), ]
I hope it helps.
Best,
Dimitris
Niccolò Bassani wrote:
Dear R users,I'm facing a trivial problem, but I really can't solve it. I've
tried a dozen of codes, but I can't get the result I want.
The question is: I have a dataframe like this one
[,1] [,2] [,3] [,4] [,5]
[1,] 1 2 3 4 5
[2,] 2 5 5 4 9
[3,] 1 6 8 1 2
[4,] 8 6 4 1 5
made up of decimal numbers, of course.
I want to append this dataframe to itself a number x of times, i.e. 3. That
is I want a dataframe like this
[,1] [,2] [,3] [,4] [,5]
[1,] 1 2 3 4 5
[2,] 2 5 5 4 9
[3,] 1 6 8 1 2
[4,] 8 6 4 1 5
[5,] 1 2 3 4 5
[6,] 2 5 5 4 9
[7,] 1 6 8 1 2
[8,] 8 6 4 1 5
[9,] 1 2 3 4 5
[10,] 2 5 5 4 9
[11,] 1 6 8 1 2
[12,] 8 6 4 1 5
I'm searching for an "authomatic" way to do this (I've already used the
rbind re-writing x times the name of the frame...), as it must enter a
function where one argument is exactly the number x of times to repeat this
frame.
Any ideas??
Thanks in advance!
Niccolò
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--
Dimitris Rizopoulos
Assistant Professor
Department of Biostatistics
Erasmus Medical Center
Address: PO Box 2040, 3000 CA Rotterdam, the Netherlands
Tel: +31/(0)10/7043478
Fax: +31/(0)10/7043014
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