how to construct an affinity matrix?

Excuse me,I have a matrix and I wanna construct an affinity of it. How can I do it? Thanks for answering.

[Mayssa]

what do you mean by affinity matrix ? is it the same as similarity matrix ?

[santosh]

yes

Answer 1

[Richard Brown]

This might be helpful

http://www.mathworks.com/matlabcentral/fileexchange/26354-spectral-clustering-algorithms

[syen lai]

It's different with what I wanna construct.While ,what you offer is also useful.Thanks again.

Answer 2

[Walter Roberson]

Is "affinity matrix" the same as covariance matrix? If so then use cov()

[syen lai]

thanks,while they are not same.But I've got the code.

[jawad bdoor]

Code you give me the code since I need it?

[marios gaval]

i need the code too please

[santosh]

can you please share the code of converting an image in to affinity matrix

[santosh]

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