Calculation the mean of a portion of a matrix

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Hello!
I am having trouble finding out how can I calculate the mean of all the values in a 10x10 matrix (z) which do not lie along an edge of that same matrix (z)...
Thanks in advance!

Respuesta aceptada

Matt J
Matt J el 23 de Feb. de 2021
Editada: Matt J el 23 de Feb. de 2021
mean( z(2:end-1,2:end-1) ,'all')
  3 comentarios
Matt J
Matt J el 23 de Feb. de 2021
Editada: Matt J el 23 de Feb. de 2021
You're quite welcome, but please Accept-click the answer to indicate that it does what you need.
The 2:end-1 is equivalent in this context to 2:10-1 or 2:9. It as as if you had written z(2:9,2:9). See also,
Moheb Amir Adel Kamel Rafla
Moheb Amir Adel Kamel Rafla el 23 de Feb. de 2021
Ah ok I get it! Thank you so much!

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