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

Karin Westin karin.westin85 at gmail.com
Fri May 7 08:49:18 EDT 2021
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Ok thanks!

Skickat från min iPhone

> 7 maj 2021 kl. 13:46 skrev Alexandre Gramfort <alexandre.gramfort at inria.fr>:
> 
> 
>         External Email - Use Caution        
> 
> yes it's like this
> 
> Alex
> 
>> On Fri, May 7, 2021 at 11:49 AM Karin Westin <karin.westin85 at gmail.com> wrote:
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>> 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>:
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>>> 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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