[R] comparing matrices using max or min

[Dimitris Rizopoulos]

you just need pmax() or pmin(), e.g., check this:

set.seed(123)
M1 <- matrix(rnorm(20), 4, 5)
M2 <- matrix(rnorm(20), 4, 5)
M3 <- matrix(rnorm(20), 4, 5)

M1; M2; M3
pmax(M1, M2, M3)
pmin(M1, M2, M3)


I hope it helps.

Best,
Dimitris


Diogo André Alagador wrote:
> Dear all,
>  
> I have 3 matrices with the same dimension, A,B,C and I would like to produce
> a matrix D where in each position would retrieve the max(or min) value along
> A,B,C taken from the same position.
> I guess that apply functions should fit, but for matrices objects I am not
> getting it.
>  
> thanks in advance,
>  
> Diogo André Alagador
> 
> 	[[alternative HTML version deleted]]
> 
> 
> 
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-- 
Dimitris Rizopoulos
Assistant Professor
Department of Biostatistics
Erasmus Medical Center

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