anton siswo
Posts:
2
From:
Indonesia
Registered:
3/22/13


Creating matrix from another matrix using column position
Posted:
Mar 24, 2013 11:23 PM


Hello everyone here.....
I have problem here, I have a matrix 16x24, lets call it matrix A. There is Matrix B 24x24 which depend on the reading row and column with values from Matrix A.
Here are link for matrix A: https://docs.google.com/file/d/0BdcMNCq0QF8OTdPMS1WRVNxb1k/edit?usp=sharing
After that, I want to create matrix C, consist of matrix 150x150.
The rule are below here:
1. Matrix C formed from matrix A. 2. Each row and column from matrix C are read the values from matrix A for each row, not the entire matrix. If there is no values from matrix A (based on the tables) from each row from matrix A, such as A[1,100] then the value in C[1,100] is 0. For examples, row and column in matrix C [49,50] are formed from matrix A, for 49 in [8,1];[7,10];[4,13];[3,22] and for 50 in [8,2];[7,11];[4,14];[3,23]. I'm already using Position command in mathematica. 3. After that, get the column value only from matrix C for 49 and 50. It should be like this, for 49> 1,10,13,22 and for 50 > 2,11,14,23. 4. When we already got the column value for 49 and 50, we are forming the value from point 3 into [1,2];[10,11];[13,14];[22,23]. this 4 new elements are taking the value from matrix B in B[1,2];B[10,11];B[13,14];B[22,23]. 5. After finished taking the value in matrix B, we sum it. So it should be sum of values from B[1,2] + B[10,11] + B[13,14] + B[22,23]. 6. When finished, we take the result in matrix C. So, it should be C[49,50] = value from B[1,2] + B[10,11] + B[13,14] + B[22,23]. 7. It goes along the way for matrix C starting from [1,1] until [150,150] using the rules before.
So, my question is how to implement it in mathematica? I'va been stuck for a month, because of this algorithm.
Thank you very much and I do sorry for my bad grammar.

