# Spatiotemporal Cluster Analysis of Time-Frequency Data **URL:** \ **Category:** Mailing List Archive (read-only)\ **Tags:** list-archive\ **Created:** [May 9, 2019, 6:40pm UTC](https://mne.discourse.group/t/spatiotemporal-cluster-analysis-of-time-frequency-data/1841 "2019-05-09T18:40:18Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/mne/original/1X/85cc6bd2b69cb698a166dc6d880fb550510d0144.jpeg) [@system](https://mne.discourse.group/u/system)\ **Post date:** [May 9, 2019, 6:40pm UTC](https://mne.discourse.group/t/spatiotemporal-cluster-analysis-of-time-frequency-data/1841/1 "2019-05-09T18:40:18Z")
External Email - Use Caution Hi all, I have been used \*spatio\_temporal\_cluster\_1samp\_test\* on my time-frequency data (power (EpochsTFR) with a shape:[epochs X chan X freqs X time] ). I have read the cited paper (MarisOostenveld07) for the permutation tests. However, it is still not clear to me what these functions are exactly doing. I have confused about the cluster analysis after seeing my plots. I have attached my code here. I used a public dataset (eegbci) as an example. My code could seem long, but most parts are related to plotting. There are two main functions and I made more major parts bold and with bigger font sizes.    More specifically, I am wondering if transforming participants' power data to \*EpochsTFR\*" and "\*AverageTFR\*" is the correct way of analyzing multiple participants? (e.g, after getting the power/ itc data for each participant saving it in a multidimensional array and then transform it to EpochsTFR or AverageTFR).     Additionally, what do cluster\_p\_values tell us? Don't they show the significance of one point in a power/itc data? So if I look at one point in power/itc plot, its corresponding point in cluster\_p\_values plot should tell me whether or not that point is significant? I would be very thankful if someone can help me with these questions. Thank you, -Mary """