Is this a new bug?
信息
此问题已关闭。 请重新打开它进行编辑或回答。
显示 更早的评论
A'*A, its eigenvalues' calculated results has a negetive value:
C =
0.0215 -0.0014 -0.2572
-0.0014 0.0006 0.1029
-0.2572 0.1029 18.0000
eig(C'*C)
ans =
-1.22819777351878e-17
0.000316768541555439
324.153592202518
3 个评论
Walter Roberson
2020-7-21
which release and OS are you using?
1.31720860254795e-10
0.000317607460000373
324.153629422408
Bruno Luong
2020-7-21
Before asking for release make sure you guys exchange data not from screen display.
Walter Roberson
2020-7-21
num2hex can show us the exact values you used
回答（1 个）
Bruno Luong
2020-7-21
编辑：Bruno Luong
2020-7-21
Numerical inaccuracy limitation. Nothing new in this front and no one consider them as BUG.
Sometime symmetrize the matrix help
D = C'*C;
eig(0.5*(D + D'))
Further reading if the above is not enough to solve the "bug": nearest SPD
0 个评论
此问题已关闭。
关闭：
2021-8-20
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
