directionality of pli_multitaper_max_fs-1_fmin-0_fmax-0-5

[anniegbryant]

Hi Oliver,

Just wondering about the directionality of the SPI "pli_multitaper_max_fs-1_fmin-0_fmax-0-5"? In the pyspi manuscript, it's listed as undirected. However, in my dataset, I found that observation_1 --> observation_2 has a different value from observation_2 --> observation_1. Can you please clarify whether this feature is undirected or directed?

Thank you :)

[olivercliff]

Hi Annie, this measure is derived from the spectral_connectivity toolbox and should be undirected.

Are you able to send the data you're using and I'll double check there's nothing wrong on this end before sending the issue over?

[anniegbryant]

example_dataset.zip

Sure, I've added an example dataset in which the values were different depending on direction here as a zipped .npy matrix.

[olivercliff]

OK I just had a look and you're definitely right -- the PLI statistics (and some related stats) are asymmetric. I'll open an issue on the original repository.