Info
Diese Frage ist geschlossen. Öffnen Sie sie erneut, um sie zu bearbeiten oder zu beantworten.
"CHOL" function inconsistent results?
2 Ansichten (letzte 30 Tage)
Ältere Kommentare anzeigen
Hi,
I'm trying to perform Cholesky decomposition for Matrix 'A' (size 3652x3652), when I use:
isequal(A,A')
I get '1' as answer, so it is symmetric.
When I use:
[L,p] = chol(A)
I get p = 0 , so it is Positive Definite, & 'L' is Upper triangle matrix (size 3652x3652),
But when I use:
[L,p] = chol(A, 'lower')
I get p = 190 !! , and 'L' is Lower triangle matrix (size 189x189) !!,
I am confused, is 'A' Positive definite or not??
I know that chol(A, 'lower') will analyze the lower triangle of 'A', and chol(A, 'upper') will analyze the upper triangle of 'A',
but since 'A' is Symmetric so the upper triangle is the same as the lower triangle (Am I right?).
Any suggestions??
Thanks
0 Kommentare
Antworten (0)
Diese Frage ist geschlossen.
Siehe auch
Produkte
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!