Bizarre matrix in pmap and tmap of permutation Wilcoxon test done on the PLV values

[Raymundo.Cassani]

Hi @alonso1989,

PLV is a symmetric connectivity metric, thus redundant elements are not saved to optimize storage space. Having 2080 elements, it seems PLV was computed with 64 channels, then 64*64 = 4096 elements (per frequency band). The saved 2080 elements are the upper triangle of the connectivity matrix (2016 elements) plus the diagonal (64 elements).

You can find more info in this post:

Visualize Connectivity matrix using imagesc

Hi, I want to visualize the correlation matrix using the Matlab command "imagesc". But, the matrix exported from Brainstorm to Matlab is a somewhat different matrix to visualize N x N matrix. Here I am having TF: [36856×1×100 double] 36856 indicates ch information 100 indicates frequency information from 1Hz to 100Hz. The number of MEG channels is 271. How can I visualize the 271x271 matrix at Frequency f. conn = struct with fields: TF: [36856×1×100 double] TFmask: […

and:
https://neuroimage.usc.edu/brainstorm/Tutorials/Connectivity#On_the_hard_drive