<div dir="ltr"><div dir="ltr"><div>Dear all,</div><div><br></div><div>I've collected data using a 128 channel EEG cap, and I tried to perform ICA on the data. However, I got an error message with fieldtrip on Matlab. Here's the error message:</div>
<div><br></div><div><div>the input is raw data with 127 channels and 1 trials</div><div>selecting 123 channels</div><div>baseline correcting data </div><div>scaling data with 1 over 148.247820</div><div>concatenating data.</div>
<div>concatenated data matrix size 123x2789000</div><div>starting decomposition using runica</div><div><br></div><div>Input data size [123,2789000] = 123 channels, 2789000 frames/nFinding 123 ICA components using logistic ICA.</div>
<div>Decomposing 184 frames per ICA weight ((15129)^2 = 2789000 weights, Initial learning rate will be 0.001, block size 75.</div><div>Learning rate will be multiplied by 0.9 whenever angledelta >= 60 deg.</div><div>More than 32 channels: default stopping weight change 1E-7</div>
<div>Training will end when wchange < 1e-07 or after 512 steps.</div><div>Online bias adjustment will be used.</div><div>Removing mean of each channel ...</div><div>Final training data range: -3.46556 to 6.39436</div><div>
Computing the sphering matrix...</div><div>Starting weights are the identity matrix ...</div><div>Sphering the data ...</div><div>Beginning ICA training ...</div><div>Data has rank 119. Cannot compute 123 components.</div>
<div>the call to "ft_componentanalysis" took 148 seconds</div></div><div><br></div><div>Could someone please let me know what went wrong?</div><div><br></div><div>Thanks!</div><div><br></div><div>Cheers,</div><div>
Hweeling</div><div><br></div></div>
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