baboonWorksFine

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visits member for 2 years, 7 months
seen Apr 17 '11 at 19:55
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let it be!


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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?
Mar
10
 asked what does “a sequence of at most 5 paths” mean?
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