NxN coehrence connectivity

Discussions
1

Hi guys,

When we display the NxN coherence connectivity as a graph, it is possible to observe some connections between electrodes.
I know that the threshold can be defined manually, but how is it determined automatically? Is it based on percentiles, factor analysis, or other measures?
For example, in the figure displayed automatically, what defined the 5 coherence connectivity measures we see?

Coherence connectivity
Coherence connectivity597×541 21.4 KB

Thanks!
Marcos

2

Hi Marcos,

For sake of plotting, it is set automatically at 90% of the value range in the figure, i.e.:

threshold = Min + 0.9*(Max-Min)

In connectivity metrics that are frequency-defined, as coherence, it will be 90% if the largest coherence value for the frequency band that is shown.

1 Like
3

Thanks Raymundo. You helped me a lot.. Again..