Re: [R] sum of unknown number of matrices

G'day Shubha, On Wed, 4 Jun 2008 20:23:35 +0530 "Shubha Vishwanath Karanth" <[EMAIL PROTECTED]> wrote: > Something like do.call("+",l) is not working...why is this? Well, as the error message says, "+" is either a unary or a binary operator, i.e. it takes either one or two arguments, but not mor

Re: [R] sum of unknown number of matrices

[mailto:[EMAIL PROTECTED] Sent: Wednesday, June 04, 2008 8:49 PM To: Shubha Vishwanath Karanth Cc: [EMAIL PROTECTED] Subject: Re: [R] sum of unknown number of matrices Shubha Vishwanath Karanth wrote: > I need: > >> a+b+c+d > > [,1] [,2] > > [1,]4

Re: [R] sum of unknown number of matrices

t of Sociology McMaster University Hamilton, Ontario, Canada web: socserv.mcmaster.ca/jfox > -Original Message- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On > Behalf Of Shubha Vishwanath Karanth > Sent: June-04-08 10:54 AM > To: [EMAIL PROTECTED] > Subject: [R] sum of unknown num

Re: [R] sum of unknown number of matrices

Shubha Vishwanath Karanth wrote: I need: a+b+c+d [,1] [,2] [1,]4 12 [2,]8 16 Something like do.call("+",l) is not working...why is this? Because do.call constructs a function call with the elements of l as arguments, so you end up with: "+"(1:4, 1:4, 1:4, 1:4)

Re: [R] sum of unknown number of matrices

nt.kuleuven.be/~m0390867/dimitris.htm - Original Message - From: "Shubha Vishwanath Karanth" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Wednesday, June 04, 2008 4:53 PM Subject: [R] sum of unknown number of matrices Hi R, I have a list of matrices. I need to

[R] sum of unknown number of matrices

Hi R, I have a list of matrices. I need to get the sum of all the matrices in the list. Example: a=b=c=d=matrix(1:4,2,2) l=list(a,b,c,d) I need: > a+b+c+d [,1] [,2] [1,]4 12 [2,]8 16 Something like do.call("+",l) is not working...why is this? I may n