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help > RE: Hierarchical clustering
Aug 21, 2017 07:08 AM | tracywx
RE: Hierarchical clustering
Dear Alfonso,
I have a similar question related to this hierarchical clustering. So now for each subject, there should be a hierarchical clustering matrix. But how does CONN manage for more than one subject? Does it just average all the subjects' adjacency matrix or do something like statistics to get the final distance and clustering results? I'm quite confused about it. Could you please explain a little bit? Thanks a lot!
Best,
Tracy
Originally posted by Alfonso Nieto-Castanon:
I have a similar question related to this hierarchical clustering. So now for each subject, there should be a hierarchical clustering matrix. But how does CONN manage for more than one subject? Does it just average all the subjects' adjacency matrix or do something like statistics to get the final distance and clustering results? I'm quite confused about it. Could you please explain a little bit? Thanks a lot!
Best,
Tracy
Originally posted by Alfonso Nieto-Castanon:
Dear
Deniz,
The hierarchical clustering algorithm in the 'ROI results explorer' uses a complete linkage (further distance) method with euclidean distance metric. Distances are computed as a weighted average of differences in connectivity statistics (functional criteria) and differences in spatial location (spatial criteria) between each pair of ROIs. The weighting factor is user-defined (ranging between '0', which uses a purely functional criteria, and '1', which uses a purely spatial criteria).
Hope this helps.
Alfonso
Originally posted by Deniz Vatansever:
The hierarchical clustering algorithm in the 'ROI results explorer' uses a complete linkage (further distance) method with euclidean distance metric. Distances are computed as a weighted average of differences in connectivity statistics (functional criteria) and differences in spatial location (spatial criteria) between each pair of ROIs. The weighting factor is user-defined (ranging between '0', which uses a purely functional criteria, and '1', which uses a purely spatial criteria).
Hope this helps.
Alfonso
Originally posted by Deniz Vatansever:
Dear Alfonso and the rest of the conn team,
Thank you all for the useful toolbox. Unfortunately I wasn't able to find any information on the type of hierarchical clustering used in ROI-to-ROI explorer GUI, and how it displays the subnetworks according to functional/spatial adjacency; will be glad if you can let me know.
Kind regards,
Deniz
Thank you all for the useful toolbox. Unfortunately I wasn't able to find any information on the type of hierarchical clustering used in ROI-to-ROI explorer GUI, and how it displays the subnetworks according to functional/spatial adjacency; will be glad if you can let me know.
Kind regards,
Deniz
Threaded View
| Title | Author | Date |
|---|---|---|
| Deniz Vatansever | Feb 6, 2014 | |
| Alfonso Nieto-Castanon | Apr 22, 2014 | |
| tracywx | Aug 21, 2017 | |