[Eeglablist] ICA

[Keith Yoder]

Hi Bubble,

1. When EEGLAB performs ICA (runica.m), it first calculates the number
linearly independent channels in the data (EEG.data).  If every channel is
independent (e.g. no electrode bridging has occurred), then there will be as
many components as there are channels.

2. You can view the data by typing the following into MATLAB:
>> EEG.data(1,1,1);
The above code will give you the data point for channel 1, frame 1 in epoch
1.

-Keith
--
Research Aide
Belmonte Autism Lab
Cornell University

On Fri, Nov 20, 2009 at 12:32 PM, Bubblepreet Randhawa <
bubb09 at interchange.ubc.ca> wrote:

> Hi,
>
> I requested response to my question last week, but I didnt get reply, may
> be it was delivered in group so I am asking again, please help.
>
> I am doing ICA analysis in EEGLAB. I have two questions:
>
> 1. How EEGlab process ICA? Are the number of channels and number of
> components same? why and how?
>
> 2. How to check if the data are read in as either 2-byte integers or 4-byte
> integers properly?
>
> I got some results and they dont make sense.
>
> Thanks,
> Bubble
>
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