Hi,<br>
<br>
In one of the datasets that I am trying to compute ICA for, I did
several preprocessing steps to clean the data slightly before
ICA. Namely, I removed any linear trend in the data, subtracted
the ensemble mean (the mean of each time point across trials), and
divided by the ensemble standard deviation. After this is done, I
try to compute an ICA decomposition using the runica algorithm, the
algorithm seems to get stuck trying to find a learning rate. This
is not to say that the machine freezes, but more like it gets stuck in
an internal loop that it isn't able to break out of. Has anyone
ever experienced this problem? The dataset is approximately 70
trials, each trial has 7,144 samples, and 64 channels. I am using
a 3.2 gHz machine with 1 GB of memory running Mandrake. I have
been using eeglab for the last year or so to decompose data and have
never run into anything like this, does anyone have any ideas?<br>
<br>
Thanks,<br>
<br>
Elliot<br>