extracting data from dataset help important

[monster8844]

hello,
I have a set of data that i have to extract from a file using xml and put it in a matrix, but this matrix has the following form
x/y y1 y2 y3 ...
x1 (2,3) (4,6)(3,7)
x2 ... ... ...
...
the final matrix must look like this

X/Y y1y1 y2y1 y3y1 ...y1y2 y2y2 y3y2... y1y3 y2y3 y3y3....y1yjy2yjy3yj.....
x1x1
x2x1
...
x1x2
x2x2
...
x1x3
x2x3.
.....
x1xj
x2xj
....
where the first numbers (x,y) are the matrix that i have, and the others represent set of matrix from the given set of data that i have, i want to add them together the same way as above
any help plz



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