[Mne_analysis] Viewing Head Models

[dgw]

On Tue, Aug 12, 2014 at 4:33 PM, Isaiah C. Smith
<Isaiah.C.Smith.17 at dartmouth.edu> wrote:
> Hello D,
> What I am trying to say is that I did the tutorial, and I am now trying to do it with other data that I have. I have a file containing the location of the electrodes in a .elc format and I am wondering how to incorporate these electrodes onto my head model.

I'm not familiar with the .elc format. Were you able to convert the
raw EEG file to fiff format? There may be a tool for doing this
automatically, in the file conversion. Can you tell me more about your
data? What system it was generated by? If you converted the raw EEG
data? What tool you used to convert the data?

If there isn't a tool you can always manipulate the raw fif file in
MATLAB and add in the necessary fields to your raw file and save it to
a new file (but first let's find out if there is an automated tool).

> In addition, where can I find the file containing the lead field matrix? Just the matrix.

The lead field matrix is in the -fwd.fif file you created in the
sample tutorial. The MNE matlab toolbox has a  function (the manual
chapter describes how to read it and what the different fields are) if
i remember correctly, it is mne_read_forward_solution(<fname>)).

HTH,
D

>
> Isaiah
> On Aug 12, 2014, at 5:32 AM, dgw <dgwakeman at gmail.com> wrote:
>
>> Hi Isaiah,
>>
>> I'm not really sure from your email what you are having difficulty
>> with. In "The sample data set" chapter
>> (http://martinos.org/mne/stable/manual/sampledata.html), there is a
>> description of how to perform these steps in the following
>> subsections:
>>
>> The forward solution
>>
>> The inverse operator decomposition
>>
>> Interactive analysis
>>
>> If there is a particular part of this you are having trouble with, can
>> you describe the problem you are having in more detail.
>>
>> HTH,
>> D
>>
>>
>> On Mon, Aug 11, 2014 at 11:22 PM, Isaiah C. Smith
>> <Isaiah.C.Smith.17 at dartmouth.edu> wrote:
>>> Hello D,
>>>
>>> I went through the tutorial and I am wondering how I can find the lead field matrix and create source models from my data in MATLAB after having made the volume conduction models.
>>>
>>> Isaiah
>>> On Aug 11, 2014, at 6:17 AM, dgw <dgwakeman at gmail.com> wrote:
>>>
>>>> Hi Isaiah,
>>>>
>>>> It may be helpful to start with the sample data set chapter (and run
>>>> through that example). This will take you step by step through the
>>>> basic analysis procedure and show you how to perform each of the
>>>> checks etc.
>>>>
>>>> HTH,
>>>> D
>>>>
>>>> On Fri, Aug 8, 2014 at 6:07 PM, Isaiah C. Smith
>>>> <Isaiah.C.Smith.17 at dartmouth.edu> wrote:
>>>>> Hello,
>>>>>
>>>>> I am following the cook book in order to create head models and find the
>>>>> lead field matrix. I have just finished using mne_prepare_model_bem. How do
>>>>> I view my results and how do I prepare this output for
>>>>> mne_do_forward_solution so that I can find the lead field matrix?
>>>>>
>>>>> Isaiah Smith
>>>>>
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