repacing a value by another

I have a matrix of 100x6 for ex let me take 6x6

[1   2  3  4  5  6 
11  58  12 8  2  12
 2  10  36 69 1  20
14  85  94 20 36 5
19  58  41 52 69 87
10  25  36 78 01 25]

now i want to replace the values as this,taking evry 2 elements in column wise as a pair,

for ex 1&11 must be replaced by a number 0.1

2 and 14 must be replaced by 0.2

19and 10 must be replaced by 0.3 (these for first column)

for 2nd column the values must be replaced is 2.0,2.1,2.2.....

please help

[Jan]

I do not understand the pattern. Do the new values depend on the old values, or just on the indices? Why is "19 and 10" replaced by 0.3?

Answer 1

[Andrei Bobrov]

A =rand(100,6);

[i1,j1] = ndgrid( 1:ceil(size(A,1)/2),1:size(A,2));
i1(:,2:end) = i1(:,2:end) - 1;
j1(:,1) = j1(:,1) - 1;
k=max(max(ceil(log10(i1))));
i1 = i1./10.^(k);
out = reshape(permute(repmat(i1+j1,[1,1,2]),[2 3 1]),size(A,2),[])';