how use reshape ?

i have mat file contains data. as follow

2 5 4 7 8 
2 5 8 4 6
1 5 2 5 8 
3 6 4 8 4

I wants it's output as a

 1 1 2
2 1 2
3 1 1 
4 1 3
1 2 5
2 2 5
3 2 5
4 2 6
1 3 4
2 3 8
3 3 2
4 3 4
1 4 7
2 4 4
3 4 5
4 4 8
1 5 8
2 5 6
3 5 8
4 5 4

where first vector is row number second vector is column number and third vector is data value according to row and column number. This is just an example. in reality I have a matrix of 120*288. hope you understand.

Answer 1

[Andrei Bobrov]

data = [2 5 4 7 8 
2 5 8 4 6
1 5 2 5 8 
3 6 4 8 4];

[x,y] = ndgrid(1:size(data,1),1:size(data,2));
out = [x(:),y(:),data(:)];

or

d = data;
d(d == 0) = nan;
[x,y,v] = find(d);

out = [x,y,v];
out(isnan(out)) = 0;

or

out = [fullfact(size(data)),data(:)];

[pruth]

thank you sir.

Answer 2

[KSSV]

A = [2 5 4 7 8 
2 5 8 4 6
1 5 2 5 8 
3 6 4 8 4];

C1 = repmat(1:4,1,5)' ;
C2 = repelem(1:4,5)' ;
C3 = A(:) ;
C = [C1 C2 C3]