151 reputation
6
bio website
location
age
visits member for 4 years, 1 month
seen Apr 17 '11 at 19:55

let it be!


Oct
26
awarded  Popular Question
Sep
24
awarded  Autobiographer
Jul
2
awarded  Curious
Jan
12
awarded  Popular Question
Apr
16
comment For a covariance matrix, what would be the properties associated with the eigenvectors space of this matrix?
How to set things up? and what would be the U*transpose(U)
Apr
16
asked For a covariance matrix, what would be the properties associated with the eigenvectors space of this matrix?
Apr
12
asked What is the difference between $\mathbf X\mathbf X^\prime$ and $(\mathbf X-\mu)(\mathbf X-\mu)^\prime$?
Apr
10
comment What is the meaning of the multiplication of matrix which is composed of eigenvectors and the transpose of it?
Yes, matrix A is symmetric, positive, semidefinite
Apr
10
revised What is the meaning of the multiplication of matrix which is composed of eigenvectors and the transpose of it?
added 50 characters in body
Apr
10
comment What is the meaning of the multiplication of matrix which is composed of eigenvectors and the transpose of it?
@user8268: it is definitely inner product, but I'd like to know the properties of this matrix, I guess it is the projection matrix , it is orthogonal, and if I want to project a new sample vector to this matrix, so to do dimensionality reduction, correct me.
Apr
10
revised What is the meaning of the multiplication of matrix which is composed of eigenvectors and the transpose of it?
deleted 9 characters in body
Apr
10
comment What is the meaning of the multiplication of matrix which is composed of eigenvectors and the transpose of it?
Hope I am clear enough now.
Apr
10
awarded  Editor
Apr
10
revised What is the meaning of the multiplication of matrix which is composed of eigenvectors and the transpose of it?
added 107 characters in body
Apr
10
asked What is the meaning of the multiplication of matrix which is composed of eigenvectors and the transpose of it?
Nov
28
awarded  Student
Nov
28
asked how to diagonalize a large sparse symmetric matrix, to get the eigenvalues and eigenvectors
Oct
11
asked how to find co-prime numbers