R help - Aug 2009 - Help for R (Advanced matrix addition (large or undefined number of matrices)

Dear Sirs,

I would like to ask you, what function can I use for matrices addition?
I couldn't find any information about it in the manual or in the
internet.
(A+B suits, when the number of matrixes is small, function sum() doesn't
suit for matrices addition, because it sums all variables in the
matrices and produces as an answer single number, not a matrix).
I would be very thankful for your help.

Best regards,
Lina 


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Rusyte, Lina wrote:
> 
> Dear Sirs,
> 
> I would like to ask you, what function can I use for matrices addition?
> I couldn't find any information about it in the manual or in the
> internet.
> (A+B suits, when the number of matrixes is small, function sum()
doesn't
> suit for matrices addition, because it sums all variables in the
> matrices and produces as an answer single number, not a matrix).
> I would be very thankful for your help.
> 
> 
 If you can get your matrices into a list, use Reduce():
> A = matrix(runif(100),nrow=10)
> B = Reduce("+",list(A,A,A,A,A))
> max(abs(B-5*A))
-- 
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Dear Sirs,
 
I would like to ask you, what function can I use for matrices addition? I
couldn’t find any information about it in the manual or in the internet.
(A+B suits, when the number of matrixes is small, function sum() doesn’t suit
for matrices addition, because it sums all variables in the matrices and
produces as an answer single number, not a matrix).
I would be very thankful for your help.
 
Best regards,
Lina 


      
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