Hi all,

For the last few days I've been playing around a lot with the data to get a bit of a feeling what all the files are for, visualizing it etc. Now I want to plug the data into my algorithm but due to the structure of the data I'm a bit stuck.
For example, I extract one of the brain slices (i.e. [: : 19 1] from snwmrda1018959_session_1_rest_1.nii I get a 49x58 matrix (from the KII data set).
(1) What are the values in this matrix? Activation values? What is the range of this data?
(2) My idea was to create a correlation matrix, threshold this and then make it into either a weighted graph (adjacency matrix) or undirected graph. Apply my algorithm to cluster this graph and using the output to create some colormap that I can use as overlay for the data to visualize it.
So I'm not really sure how to use the mask to create a adjacency graph from a slice?


Thanks in advance.

 - Niels

(Ps. if this idea is completely not the way to do these things, I appreciate any pointers to how it should be done)