How to rank data and set corresponsing values
조회 수: 1 (최근 30일)
이전 댓글 표시
I have data, 10 columns and over 200 rows. First two rows are:
0,004130861 0,001492476 -0,001031031 0,0033182 0,000327482 0,000510943 0,00083309 0,001345621 -0,002916075 6,51063E-05
0,003489052 0,001341031 -0,000738983 0,00290706 0,0001296 0,001039578 0,00099295 0,001224308 -0,002254135 -8,60491E-05
I need to rank the data from 1 - 10, so it becomes
1 3 9 2 7 6 5 4 10 8
1 3 9 2 7 5 6 4 10 8
and then set lowest value here to 1 and highest value to -1, seeting all other to 0, so it becomes
-1 0 0 0 0 0 0 0 1 0
-1 0 0 0 0 0 0 0 1 0
And so on for all other rows
How do i code this?
댓글 수: 1
Benjamin Thompson
2022년 3월 14일
What does "rank" mean in your problem? I do not see the input to output relationship in the problem statement. Are you sorting them from high to low, or low to high, along each row? Then the final output has one +1, one -1, and the rest are zeros, where +1 means the max and -1 means the min.
답변 (1개)
Scott MacKenzie
2022년 3월 14일
편집: Scott MacKenzie
2022년 3월 14일
Assuming the rankings are just used to explain your final goal, the following seems to work:
M1 = [0.004130861 0.001492476 -0.001031031 0.0033182 0.000327482 0.000510943 0.00083309 0.001345621 -0.002916075 6.51063E-05; 0.003489052 0.001341031 -0.000738983 0.00290706 0.0001296 0.001039578 0.00099295 0.001224308 -0.002254135 -8.60491E-05];
M2 = zeros(size(M1));
[~, idxMin] = min(M1, [], 2);
[~, idxMax] = max(M1, [], 2);
M2(:,idxMin) = 1;
M2(:,idxMax) = -1;
M1 % initial matrix
M2 % result
댓글 수: 0
참고 항목
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!