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<p>Hi all,<br>
</p>
<p>this is probably a fairly basic question.<br>
</p>
<p>I'm trying to run an ICA on my epoched data, but I come across an error that I don't understand. Note that in the past I already succeded in running an ICA on the same dataset, so I really can't understand what is changed.<br>
</p>
<p>------------------------------------------------------------------------------------------------<br>
</p>
<p><br>
</p>
<p>Here the error I am getting:<br>
</p>
<p><span style="font-size: 12pt;"><br>
</span></p>
<p><span style="font-size: 12pt;">scaling data with 1 over 86.290718</span><br>
</p>
<div>concatenating data.......................................................................................................<br>
</div>
<div>concatenated data matrix size 64x590112</div>
<div>starting decomposition using runica</div>
<div>runica(): unknown flag<span style="color: rgb(255, 0, 0); text-decoration: none solid rgb(255, 0, 0);">Error using ft_notification (line 340)</span></div>
<div><span style="color: rgb(255, 0, 0); text-decoration: none solid rgb(255, 0, 0);">the component unmixing failed</span></div>
<div><br style="color: rgb(255, 0, 0); text-decoration: none solid rgb(255, 0, 0);">
</div>
<div><span style="color: rgb(255, 0, 0); text-decoration: none solid rgb(255, 0, 0);">Error in ft_error (line 39)</span></div>
<div><span style="color: rgb(255, 0, 0); text-decoration: none solid rgb(255, 0, 0);"> ft_notification(varargin{:});</span></div>
<div><br style="color: rgb(255, 0, 0); text-decoration: none solid rgb(255, 0, 0);">
</div>
<div><span style="color: rgb(255, 0, 0); text-decoration: none solid rgb(255, 0, 0);">Error in ft_componentanalysis (line 800)</span></div>
<div><span style="color: rgb(255, 0, 0); text-decoration: none solid rgb(255, 0, 0);"> ft_error('the component unmixing failed');</span><br>
</div>
<p><br>
</p>
<p>------------------------------------------------------------------<br>
</p>
<p><br>
</p>
<p>The error shows up immediately, the convergence process doesn't even start.</p>
<p>The dataset is made of 288 epochs, 4 seconds long with a sampling rate of 1024 Hz. I'm running the ICA with the following parameters:<br>
</p>
<p><br>
</p>
<div>cfg = [];<br>
</div>
<div>cfg.layout= 'biosemi64.lay';</div>
<div>cfg.method = 'runica';</div>
<div>cfg.channel = 1:64;<br>
</div>
<div>comp_cue= ft_componentanalysis(cfg, data_cue);</div>
<div><br>
</div>
<div><br>
</div>
<div>Thanks for any help!<br>
</div>
<div><br>
</div>
<div>Best,</div>
<div>Silvia<br>
<br>
</div>
<div><br>
</div>
<div><br>
</div>
<p><br>
</p>
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