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precuneus


6 total contributions since 2013

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Re: Create random normal correlated data of fixed dimensionality
Thanks for the suggestion. I did something similar to this. I create X = randn(20,10) and then create V = randn(250,20); I ortho...

10 months ago | 579 views

Posted


Create random normal correlated data of fixed dimensionality embedded in higher D data
Hi, I'm looking for an efficient way to generate random correlated data of a given dimensionality, i.e. creating a subspace emb...

10 months ago | 579 views

Question


What is the fastest way to divide data by the covariance matrix?
I am doing the following calculation: X_adj = X * C^(-1/2); where X is my data, and C is a covariance matrix. I need to ...

1 year ago | 1 Answers | 0

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Re: All permutations of groups of vectors
Ok, I think I solved the first problem myself by using cell arrays. I will see if it is fast enough to loop. If you were thinkin...

3 years ago | 1879 views

Responded


Re: All permutations of groups of vectors
meshgrid or ndgrid is in general a great idea to get the appropriate combinations of row indices. So thanks a lot for this. Stil...

3 years ago | 1879 views

Posted


All permutations of groups of vectors
Hi, I have several matrices stored in a cell array. Within each matrix I want to pick one row vector and create all possible co...

3 years ago | 1879 views