Hello,
You do not have enough memory for what you are trying to execute, you need to decrease the size of the problem. You can find inspiration from the forum, for example:
But when I want to compute connectivity for all brain regions (NxN) I get the memory error
Select the option “Use scouts” and “Apply scout function: before”.
http://neuroimage.usc.edu/brainstorm/Tutorials/TimeFrequency#Scouts
this error is expected for large computation, but with SPM we did this analyzing and it took sometimes about 1 day or more.
Processing fMRI and EEG are two very different things. Expect much higher memory requirements with EEG.
How can I interpret this 3D figure?
…
I’m sorry, there are still no proper tutorials for the connectivity analysis.
With the options you selected, you are trying to compute a connectivity measure for 15171x15171 pairs of signals (all the source signals). For the coherence frequency resolution you selected, this requires the creation in memory of a few matrices of about 200Gb. This is not something you can do on any computer.
If you want to compute a full connectivity network for the whole brain, you need to decrease the size of th…
Hello
If you have a source file with 15000 vertices and try to compute the coherence NxN for this file (sampling rate = 1000Hz), the size of the output file will be:
15000 * 15000 * 500 * 8 / 1024^3 = 838 Gb!
This cannot fit in the memory of any computer…
If you select all the scouts of an atlas, with the option “Scout function: After”, it will first compute this 15000x15000 connectivity matrix and then group by scouts.
You can instead select a few scouts and/or use the option “Before”.
Fo…
Francois