Sorting data in a matrix to four or five seperate matrices.

I have a [m,n] matrix (a) and I am trying to sort the data in that matrix to 4 or 5 other matrices w1 w2 w3 w4 w5. First sorting the data to w1, then moving to w2 and so on. The rows moved to w1 are no longer used in [a] but data in w1 dictates what data is collected from [a]. Each column in [a] represents a variable's value. I am stuck,anyone have any suggestions.

[Jan]

Please post, what you have done so far. From this rough description it is impossible to know, where you are stuck.