Compute average size of 2 regions in a matrix

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Johanna Popp
Johanna Popp el 22 de Dic. de 2021
Comentada: Image Analyst el 2 de En. de 2022
Hi all,
I would like to normalze a structural connectivity matrix (360 x 360) containing the number of streamlines between any two regions by the (average/sum) size of the respective two regions.
I do have information about the size of each brain regions (360) but what I would like to do is average the size of two regions and save that number in a Matrix (360 x 360) so that each node contains information about the average size of the two regions.
Any help would be appreciated, thanks!!
  3 comentarios
Johanna Popp
Johanna Popp el 2 de En. de 2022
Editada: Johanna Popp el 2 de En. de 2022
You're right, that could be helpful. Lets say I have a vector of 5 numbers [2 4 8 9 12]. I want to create a matrix with the size 5*5 containing the average of each of the respective pairs of numbers in the corresponding field of the matrix. In this case it would be
[2 3 5 5.5 7; 3 4 6 6.5 8; 5 6 8 8.5 10; 5.5 6.5 8.5 9 10.5; 7 8 10 10.5]
Instead of the 5*1 vector that I provided here as a example, I am working with a vector containing 360 numbers.
I hope this helps, thank you!

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Pranjal Kaura
Pranjal Kaura el 28 de Dic. de 2021
Hey Johanna,
Could you please share a snippet of the data file? Further providing an example on that data would also be helpful.
  1 comentario
Johanna Popp
Johanna Popp el 2 de En. de 2022
Hi Pranjal,
please refer to my response on the comment above for an example! Thank you for your help!

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