[R] means in tables

[Silvano Cesar da Costa]

Hi.

I have 2 tables, with same dimensions (8000 x 5). Something like:

tab1:

V1   V2   V3   V4  V5
14.23 1.71 2.43 15.6 127
13.20 1.78 2.14 11.2 100
13.16 2.36 2.67 18.6 101
14.37 1.95 2.50 16.8 113
13.24 2.59 2.87 21.0 118

tab2:

V1   V2   V3   V4  V5
1.23 1.1 2.3 1.6 17
1.20 1.8 2.4 1.2 10
1.16 2.6 2.7 1.6 11
1.37 1.5 2.0 1.8 13
1.24 2.9 2.7 2.0 18

I need generate a table of averages, the elements in the same position in
both tables, like:

tab3:
(14.23 + 1.23)/2  (1.71+1.1)/2   (127+17)/2

and so on

I tried the program:

Médias = matrix(NA, nrow(tab1), ncol(tab1))
for(i in 1:nrow(tab1)){
  for(j in 1:ncol(tab1)){
    for(k in 1:nrow(tab2)){
      for(l in 1:ncol(tab2)){
        Médias = tab1$i[j]
      }}}}

Médias

but it does't  work. I don't know programming.

How can I do this?

Thanks,


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Silvano Cesar da Costa

Universidade Estadual de Londrina
Centro de Ciências Exatas
Departamento de Estatística

Fone: (43) 3371-4346