matrix

Question

zina ben 2012-2-3

关闭： MATLAB Answer Bot 2021-8-20

[A] of 12 × 12 is positive semideﬁnite matrix

Is formed with only the ﬁrst row of [A21] and [A22] as nonzero elements:

If B =1 and (A21)ij/B = (A22)ij/B = 6.0×105               
     (j = 1, 2, .. ,6).

I can’t write the matrix with their 12x 12 elements, please can you help me

[Information from duplicate question]

Hi,

I want to write the matrix S,which is 12x12 and it is positive semideﬁnite matrix.

Weighting matrice [S] is formed with only the ﬁrst row of [S21] and [S22]as nonzero elements:

note that

(S)ij/R = (S22)ij/R = 6.0×105
(j = 1, 2, ... ,6)

and

R=1

Please help me.Thanks in advance

Sean de Wolski 2012-2-3

Huh? Please clarify.

Walter Roberson 2012-2-3

Are S21 and S22 some other matrices distinct from S, or does S21 indicate S(2,1) ?

此问题已关闭。

Answer 1

Sean de Wolski 2012-2-3

gallery('randcorr',12)

creates a 12x12 positive semidefinite matrix.

zina ben 2012-2-3

Hi walter Roberson, i know is the same question as previous one

But i have just this data, i do not satisfy bay the answer of sean de wolski

Walter Roberson 2012-2-3

Please do not post duplicate Questions. I have merged your previous Question with this one, and deleted the other one.