Dear All,
I wonder if there is any R function to generate a sequence of vectors from
existing ones. For example:
x 1- c(1,2,3)
x2 - c(4,5)
x3 - c(6,7,8)
The desired output is a list of all 3*2*3 = 18 possible combinations of
elements of x1,x2 and x3. One element for example is
?expand.grid should do what you want.
--- Marc Bernard [EMAIL PROTECTED] wrote:
Dear All,
I wonder if there is any R function to generate a
sequence of vectors from existing ones. For example:
x 1- c(1,2,3)
x2 - c(4,5)
x3 - c(6,7,8)
The desired output is a list of
://www.student.kuleuven.be/~m0390867/dimitris.htm
- Original Message -
From: Marc Bernard [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Monday, November 19, 2007 3:59 PM
Subject: [R] sequence of vectors
Dear All,
I wonder if there is any R function to generate a sequence
Well, this is a natural thing to program up using 3 nested 'for',
loops. Alternatively, one could use something like:
combn - function( ..., l=list(...) )
+ {
+ lens - sapply( args, length)
+ ncomb - prod(lens)
+ retval - matrix(ncol=length(args), nrow=ncomb)
+ for(i in
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