Plot PSD of epoched data in sequence

Requests
1

Hi,

I would like to create a video (or an image with several subplots) of my 6 sec window psd (obtained impoting 6 sec epoched data of 5 inutes), in order to observe how its psd topography changes over time, could you please create this option? I think it is useful to get a sense of data.

Thank you

Annie

2
  • Right-click on your file > 2D sensor cap / 2D disc.
  • Make the window smaller (so that relatively the time stamps get displayed bigger)
  • Select the frequency you are interested in (using the frequency slider in the Brainstorm window, or opening another view that has the frequency axis)
  • right-click on the figure > Snapshot > Movie(time): selected figure or Time contact sheet: figure
3

Hi,

I tried but this is the result:

image
image1515×857 134 KB

As you can see from the figure I divided a 4 minute segment into 40 blocks (6 sec each).
I computed the psd for each plot. I want to watch the movie in a specific frequency band from time 0 to time 4 minute (i.e. 40 frames in sequence).

Thanks

Annie

5

It looks like you're trying with one single file that contains only one value (no time dimension), or that you right-click on the wrong file to get the 2d topography. The loaded time window at the top-right-corner of the Brainstorm window is [180-185s], therefore indeed, you can't make time movies.

Concatenate your PSD files first:
Select all your epochs in Process1, select the button "process time-freq" on the left, run process Standardize > Concatenate time