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Thread Subject:
eigenvector equation doubt

Subject: eigenvector equation doubt

From: shahnaz fatima

Date: 13 Sep, 2010 14:31:37

Message: 1 of 2

any body here plz help me with the eigen equation.

suppose i have an eigen equation

Wy=lamda Dy;

does that mean that the eigen vectors y are the eigen vectors of D-W

plz explain.its urgent

Subject: eigenvector equation doubt

From: Roger Stafford

Date: 13 Sep, 2010 15:00:23

Message: 2 of 2

"shahnaz fatima" <shahnaz1981fat@gmail.com> wrote in message <i6lck9$e6j$1@fred.mathworks.com>...
> any body here plz help me with the eigen equation.
>
> suppose i have an eigen equation
>
> Wy=lamda Dy;
>
> does that mean that the eigen vectors y are the eigen vectors of D-W
>
> plz explain.its urgent
- - - - - - - -
  No it doesn't mean that. If D is a general square matrix, what it means is that the y vector is a generalized eigenvector as given by

 [Y,L] = eig(W,D)

with y one of the columns of Y and lambda a corresponding generalized eigenvalue in L. Also if D is invertible, it means that y is an eigenvector of inv(D)*W with lambda as the corresponding eigenvalue.

  See the documentation for eig (where A and B correspond to your W and D.)

Roger Stafford

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