[Mne_analysis] Coordinates of dipoles in fwd['sol']['data']?

[Karin Westin]

        External Email - Use Caution        

Just one follow up question... how is the free orientation forward matrix
arranged, ie do columns 1-3 include three orientations for dipole 1, 2-6
for dipole 2 and so on?

Karin

Den tors 6 maj 2021 kl 13:17 skrev Eric Larson <larson.eric.d at gmail.com>:

>         External Email - Use Caution
>
> The forward is free orientation, i.e., 3 directions per location. 16382 *
> 2 * 3 = 98292.
>
> I'm guessing you actually have (98292 - 98268) / 3 = 8 fewer locations in
> the left hemisphere (i.e., 16374) than in the right (16382)?
>
> Eric
>
>
> On Thu, May 6, 2021 at 6:05 AM Karin Westin <karin.westin85 at gmail.com>
> wrote:
>
>>         External Email - Use Caution
>>
>> But 16382 dipoles per hemisphere don’t add up to the 98267 dipoles of the
>> forward matrix?
>>
>> Skickat från min iPhone
>>
>> 6 maj 2021 kl. 10:58 skrev Karin Westin <karin.westin85 at gmail.com>:
>>
>> Thank you for your answer!
>>
>> But from that I get
>>  np.shape(right_coords)  (16382, 3) and
>> np.shape(fwd['sol']['data'])  (130, 98268)
>>
>> so I still don't understand how to extract coordinates of dipole in
>> column j of fwd['sol']['data']?
>>
>> Thanks in advance,
>> Karin
>>
>> Den tors 6 maj 2021 kl 07:54 skrev VERRIER Clement <
>> clement.VERRIER at univ-amu.fr>:
>>
>>>         External Email - Use Caution
>>>
>>> Hello,
>>>
>>> You should be able to extract the dipoles coordinates of each hemisphere
>>> using the following (works with version 0.22.1):
>>>
>>> >>> left_hemi, right_hemi = fwd["src"]
>>> >>> left_coords, right_coords = [hemi["rr"][hemi["vertno"]] for hemi in
>>> [left_hemi, right_hemi]]
>>>
>>> If you want all coordinates (i.e. those associated with the nondecimated
>>> mesh), you just have to use remove the extra hemi["vertno"] slicing.
>>>
>>> Hope it helps!
>>>
>>> Best,
>>> Clément
>>>
>>>
>>> On 6 May 2021, at 12:54 AM, Karin Westin <karin.westin85 at gmail.com>
>>> wrote:
>>>
>>>         External Email - Use Caution
>>>
>>> Hi all!
>>>
>>> As I understood it, the matrix fwd['sol']['data'] represents sensors x
>>> dipoles. How can one extract the coordinates of these dipoles?
>>>
>>> Thanks in advance,
>>> Karin
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